Yes, he's married w/ 2 kids. I reached out to his W, she said that she's had to deal with him chasing after these online infatuations before. She didn't seem too interested in being proactive in stopping him.
And yeah, her mom knows what's going on, but my W hasn't talked to her about what's going on, so all of her knowledge comes from talking to me and she doesn't want to get in the middle by revealing that she's talked to me behind my W's back.