My wife (24f) and I (24m) have been together for 3 years and married for about six months now. We found out that we’re going to be parents and we are both very excited. We told our families over the weekend and everyone was happy for us. This morning, I got a text from my wife’s sister (21f) saying that she knows that women can get emotionally and physically abusive and can put a stop to intimacy during pregnancy and that she is willing to “help” me out anytime sexually or emotionally during and after the pregnancy.

Obviously, I have no interest in anyone other than my wife but how do I tell her what her sister offered? My wife has always been there for her sister and they have always been super close. Her sister was the MOH at our wedding. I don’t want my wife to lose that bond and it would destroy her if she found out that her sister was willing to betray her like that. At the same time, her sister is a snake and is willing to ruin our marriage and the life of her soon-to-be-nephew/niece for what I’m guessing is a childish crush on me.

My first priority is my wife and unborn child and anyone else can go to hell. How do I approach this situation? There is literally no good outcome. I can tell my wife tonight. She will be absolutely devastated. I will always be there for her and I know her parents will be on her side but losing a 20 year bond with her own sibling while in such a vulnerable state sounds terrible. How can I possibly tell my wife that the sister she loved and looked after for so many years, wanted to sleep with her husband while she was pregnant? If I don’t tell her soon and tell her later, she may lose her trust in me. If I don’t tell her at all, my wife will be close with someone who clearly does not care for her and could easily betray her again in the future.