Sexuality is complex…
I’m of the generation that opened up to homosexuality and lesbianism not being "diseases" that needed to be treated, but rather just normal sexual tendencies that should be accepted. I also thought that by age 13-15 nearly all would know what sexuality one had. Like… I knew I was heterosexual early on and have never had any interest or tendency in any other way. I used to think all others were that way – a gay person was gay, a straight person was straight.
We always have those that have for some reason hidden their sexuality. Seem to cope in society as "normal" people and can even go through life with a husband or wife, have kids and all that. Some might find outlets – one common theme here is the wife that discovers her husband has gay-sex on business trips, or like just recently they betrayed husband who was sort-of OK with his wife’s lesbian affair, but not the one with the 2-3 other men… - and some just repress their sexuality and live a seemingly happy life.
What I have had to change in my view on sexuality is that apparently it can change. Somehow a seemingly heterosexual person can develop same-sex tendencies (and possibly the other way too) over a lifetime. I don’t get it – but I don’t have to. I just have to accept that sexuality is more complex than I thought it was.
Doesn’t justify cheating… If your wife is realizing that she’s a lesbian and that’s the way she wants to go – or if she’s always been a lesbian but tried to get through life denying it – she had the option of terminating her marriage with you. She could have shared her feelings, and the two of you found some resolution. For her to go have sex or intimacy it’s not relevant if it was a man or woman. It’s cheating.
Being bi-sexual… not the issue. My wife is blonde, but I had some Burnette and red-headed girlfriends in the past. Big breasted, small breasted, tall, short… But on committing to my wife in marriage, I forsake all others… My wife is my partner and outlet for sexual needs and desires. Justifying an affair on the grounds that she’s bisexual would be like me explaining to my wife that the OW was a petite Burnette, and my wife isn’t so therefore it was sort-of-OK…
It does however impact the next steps…
Some things aren’t clear in your post. Is she still living with you? Has the divorce processed beyond the point of being talked about and actually being sought after? Is she openly in an affair with the OW? How does she identify herself sexually? Has she come out?
I think that’s the first bunch of questions you need clarified, and the key-one being: Is she a lesbian?
If she is… well… That’s it. If her sexual orientation is to other women and that’s where she want’s to go… short of a sex-change there isn’t much you can do. Trying to save the marriage or waiting for a switch back to heterosexualism… not really going to work.
In fact – if she insists she wants a divorce and is actively seeking it… Then don’t even try to save the marriage.
I doubt your wife’s unhappiness was caused by you. I doubt the marriage was really that bad. But if she has been suppressing her sexuality for all those years… that pent-up rage needs to vent and needs justification. In some ways it might be easier for her to lay it all on you for having "made" her act straight…
If you can – try this:
Tell your wife that if she want’s a divorce then that’s fine. Not what you envisioned to do in 2026 but you don’t want to keep her in a marriage she doesn’t want.
Tell her that if she wants to come out as lesbian, well… that’s fine too. Not something you saw coming but great for her to come to grasp with that.
Tell her that the marriage definitely had its ups and downs, but NEVER has EITHER of you been forced to be there. You both probably could have done better, but there isn’t really any benefit in going there. The bottom line is that IF she wants a divorce for whatever reason she gives herself then a divorce is inevitable.
Tell her the divorce will follow the laws and expectations of whatever state/country you are in, and that if both of you are realistic about expectations then that will minimize conflict.
There is no need for major anonymity. Being argumentative or rude won’t make this any easier, so maybe you two simply try to be as civil as possible until this is resolved, and then focus on being the best coparents you can for the kids.