tldr: Sister-in-law is currently dating a married man whose wife has moved out and living with another man.

Over the last month SIL has began a dating relationship with a married man using online dating to start the connection. Since the beginning of the long distance relationship it has accelerated to conversations and beliefs that they will one day be married.

The story goes…that the wife about a year ago started cheating on him and a few months ago moved out and started to live with the man she was cheating with. This left the husband abandoned and with 3 children they share. Feeling alone and abandoned he started online dating to find as he initially expressed a desire to find a female friend.

A few weeks ago he visited and at the end of the date weekend they both decided they would delete their dating profiles.

Since the man is still legally married and that children are involved I had a conversation with s-i-l that it would be best if she limited conversation and allowed him time to process this negative experience and allow him time to finally process divorce papers…he has had them twice and failed to file in a timely matter twice.

Being that the children are involved, I told her to try and think about why he would want to restart another romantic relationship so soon after a 7+ year marriage. And that it is a possibility that he is looking for a wife to take care of his children.

AITAH for sharing this POV?