My SIL is driving me nuts. Long story short: Years ago her husband cheated, she couldn't forgive & told him they could date other people because she was through with him. FF to 4-5 months ago where she says he started to pursue her again & she gave in. 2 1/2 months ago he tells her he's been talking to a woman (40yo) from his past & they're just friends. She finds out about 6 weeks ago that they're having sex & he might be making plans to leave her. Right before this he tells her he no longer loves her, things are different, & he wants a divorce. She wants the marriage to work because deep down she loves him & they have a 8yo & 12yo who will be devastated. Shes's convinced if she can get to the other woman & tell her something she can scare her off. The other woman knows about her & the kids. I don't think she's going anywhere. SIL wants to get in his locked phone (he has a different provider than she does) so she can get the chick's phone number. I have no idea how to do this, but think if she confronts the woman she'll see how hopeless it is.
Oh & yes, they're still intimate, and he's supposedly not going to leave SIL & will end things, but of course he hasn't.