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WITH the blinds drawn and the kids playing outside, Brian* and his sister-in-law Kate* found themselves chatting in the kitchen.

They were talking about the strains in their own relationships and how it had caused some friction between them.

A man has revealed how he is cheating on his wife with her sister and can't stop
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A man has revealed how he is cheating on his wife with her sister and can't stopCredit: Getty
The pair have kept it a secret and will meet up between two to three times a week
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The pair have kept it a secret and will meet up between two to three times a weekCredit: Getty

Caught up in the moment and aware it wasn't exactly proper, they ended up sharing a kiss.

They both couldn’t quite believe it, but after 15 years of undercover flirting - the pair were finally brave enough to do it. 

Brian*, who has decided to remain anonymous, doesn’t have any regrets, and neither does his sister-in-law but he went to online forum site Reddit to confess. 

In, he wrote: “My wife and I started dating when we were 18....her sister has been dating her husband since around the same time we started dating. 

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“Her sister is 37 and I'm 32.

“There has always been strong sexual tension between her sister and I. The innuendos always seem to get stronger and stronger.

“At one point when we were both just dating her sister told me that she was going to break up with him and that she wished there were ‘two of me.

“She said things like that for a long time.”

Fast forward, and they both have two kids. 

He continues: “Her husband has not wanted to have sex with her for two years.

Betrayal Within the Family: Newly-Wed Discovers Husband's Affair with Sister

“My wife has not wanted to have sex with me for probably three or four. 

“When we do, it's routine.

“Her husband was at work, my wife was at a hair appointment, and the kids were all playing in the yard. 

“Her sister and I got to talking about it one day. I said something like ‘do you realise I haven't gotten a b**w j*b in six years?’

We have had sex in both of our houses, cars, restaurant bathroom on one occasion, you name it

The anonymous cheater

“She responded with ‘well I haven't gotten f***ed in seven months, so there.’

“We were both in the kitchen, the blinds were down, and the sliding glass door was on the other side of the room. I just went for it and kissed her.

“She reciprocated and it turned into a ten second makeout. 

“She just smiled and went ‘how long have you been thinking about doing that?’

Sexy outfits

“I go ‘for about 15 years.’

“She goes ‘me too.’ Then she goes ‘just to be sure, nobody needs to know of course!’ I said of course.

“She texted me that night and said she had been thinking about the kiss and how ‘exciting’ it was because it was probably not the right thing to do, etc.

“We went back and forth on text for probably an hour. It went from playful to us texting each other that we had imagine f****ing the other one for a long time. 

Four red flags your partner is cheating

Private Investigator Aaron Bond from BondRees revealed four warning signs your partner might be cheating.

They start to take their phone everywhere with them

In close relationships, it's normal to know each other's passwords and use each other's phones, if their phone habits change then they may be hiding something.

says: "If your partner starts changing their passwords, starts taking their phone everywhere with them, even around the house or they become defensive when you ask to use their phone it could be a sign of them not being faithful."

"You should also look at how they place their phone down when not in use. If they face the phone with the screen facing down, then they could be hiding something."

They start telling you less about their day

When partners cheat they can start to avoid you, this could be down to them feeling guilty or because it makes it easier for them to lie to you.

"If you feel like your partner has suddenly begun to avoid you and they don't want to do things with you any more or they stop telling you about their day then this is another red flag."

"Partners often avoid their spouses or tell them less about their day because cheating can be tough, remembering all of your lies is impossible and it's an easy way to get caught out," says Aaron.

Their libido changes

Your partner's libido can change for a range of reasons so it may not be a sure sign of cheating but it can be a red flag according to Aaron.

Aaron says: "Cheaters often have less sex at home because they are cheating, but on occasions, they may also have more sex at home, this is because they feel guilty and use this increase in sex to hide their cheating.  You may also find that your partner will start to introduce new things into your sex life that weren't there before."

They become negative towards you

Cheaters know that cheating is wrong and to them, it will feel good, this can cause tension and anxiety within themselves which they will need to justify.

"To get rid of the tension they feel inside they will try to convince themselves that you are the problem and they will become critical of you out of nowhere.  Maybe you haven't walked the dog that day, put the dishes away or read a book to your children before bedtime.  A small problem like this can now feel like a big deal and if you experience this your partner could be cheating," warns Aaron.

“I said something like ‘just be sure the next time you wear a dress or skirt in front of me you're not wearing any underwear so we won't have to waste time.’

“She laughed and was like ‘you wouldn't...you know this is just us texting back and forth because we're h**ny.’

“Well a week later, I stopped over there with the kids at 6pm during the week. Her husband works 7am till 7pm and has a 30 minute commute. 

“My wife was out shopping with her mum.

I don't regret this at all, neither does she

The anonymous cheater

“I got over there and she was wearing extremely short shorts. Couldn't tell if it was planned or not at that point. The kids head to the yard.

“We looked at each other and I just knew. I grabbed her again and we started making out.”

The anonymous brother-in-law revealed that she pulled her into the bathroom, and the pair ended up having sex, and they haven’t stopped since then. 

They meet between two to three times a week or “whenever we can.” 

Signs your relationship is heading for a divorce

  1. Persistent Communication Breakdowns
    Constant misunderstandings, arguments, or a complete lack of meaningful conversation can signal deep-seated issues.
  2. Emotional Distance
    Feeling like roommates rather than partners, with a noticeable lack of intimacy or emotional connection.
  3. Frequent Criticism and Contempt
    Regularly criticising each other and showing contempt, such as sarcasm, eye-rolling, or mocking, can erode the relationship's foundation.
  4. Unresolved Conflicts
    Recurrent arguments about the same issues without any resolution can indicate deeper incompatibilities.
  5. Loss of Trust
    Trust is crucial in any relationship. If it's been broken and cannot be rebuilt, it may be a sign that the relationship is in trouble.
  6. Different Life Goals
    Significant differences in future aspirations, such as career goals, lifestyle choices, or family planning, can create insurmountable divides.
  7. Avoidance
    Preferring to spend time apart rather than together, whether through work, hobbies, or social activities, can indicate a desire to escape the relationship.
  8. Lack of Support
    Feeling unsupported, whether emotionally, financially, or practically, can lead to feelings of isolation and resentment.
  9. Financial Disagreements
    Constantly arguing about money, spending habits, or financial priorities can strain the relationship.
  10. Infidelity
    Whether physical or emotional, infidelity can be a major breach of trust and a sign of deeper issues in the relationship.
  11. Changes in Affection
    A noticeable decrease in affection, physical touch, or romantic gestures can indicate a loss of connection.

He continues: “We have had sex in both of our houses, cars, restaurant bathroom on one occasion, you name it.

“I don't regret this at all, neither does she. Nothing has changed in our families...we are just both getting the sex we deserve. I have no intention of stopping having sex with her. So yeah. That's my confession.”

The post gained a lot of attention, with many rushing to the comments section to share their thoughts.

One wrote: “This is one of those things that will haunt you. You don't feel it now, but it will haunt you. 

Stop what you're doing. Either divorce her or work on things

Reddit comment

“You think you're incredible. Your actions don't match up to who you believe you are.”

Another added: “Funny thing with having kids... Your mistakes affect them. If/when your kids find out, they will be damaged for life.

"Stop being a pu**y and either get counselling or get a divorce.”

A third said: “I was married once, cheated with reckless abandon. I mean I slept with......around 15 other women. Wife never found out thankfully, but it happened.

“Just for record sake I'm not excessively good looking and none were prostitutes (I find the thought of paying someone to do me excessively creepy but that's just me). 

“I just had this system worked out. I actually thought of writing a how-to so I could help other guys out, but decided not to because it wasn't helping.

“Anyway, it's always easy to be the cheater, it's new, exciting, makes your heart beat, everything. It's not easy to be cheated on though. It fills you with doubt, worry, regret, pure anguish.

“I was and am a sh***y person for what I did. I didn't regret it at the time, but I regret it now.

“If I'd put the energy into my marriage that I did sleeping around maybe I'd have been in a better spot.

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“I don't regret divorcing my ex, but I sure as hell didn't like what happened to me during that time, and we had no kids together thankfully. It was hard enough dividing up the dogs.

“Stop what you're doing. Either divorce her or work on things.”

What is an open relationship?

An open relationship means having more than one sexual partner at the same time.

Both parties in the relationship agree to be non-exclusive and one or both parties engages in sexual activities outside the relationship.

If one or both parties engage in sexual relationships without an agreement, this would be classed as cheating.

Other names for an open relationship are polyamory and consensual non-monogamy.

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