So I've been talking to this girl online for a while now, not on any dating app, on messenger, we used to go to the same high school & she doesn't live too far from me. We've been talking on & off just as friends for roughly a year, it was never flirty or sexual at first, it was always us talking & venting to each other. Now a couple days ago we started talking again, & for the first time I actually tried to flirt with her a bit, & she actually responded well. So far it seems like she's interested in getting to know me better. But there's one thing bothering me & I'm not exactly sure what to do. While I was scrolling through my feed, I saw another selfie of her, so I hearted it, & then realized there's some guy that's been commenting under all her posts, saying stuff like "Come on over your right down the road" or to a post she had that said, "Screw the talking stage, just come home we'll talk there babe", it wasn't something she wrote herself, she just shared it, but that same guy under that post commented "LMK!! WHEN!!!". I checked out this guys profile, & he's MARRIED! WITH like 3 Kids!!! So far it seems like she's completely ignoring him, cause she never reacted to any of his comments or replied to them. But what I'm wondering is, should I try to get into contact with his wife & let her know the Truth? Or should I just ignore it? Cheating is disgusting to me, ESPECIALLY if you're fucking MARRIED WITH 3 DAMN KIDS