AITA for helping(sort of) my friend leave his wife(cheated) and children(non-biological), and hiding it from his wife and my gf?

627 points•250 comments•submitted by Throwaway01236547 to r/AmItheAsshole

English is not my native language. A few weeks ago I got a call from my friend at late night asking me to meet him. Apparently he had found out that both of his children weren't his. I was surprised but he showed me the paternity test results, and also his wife confessed that they might not be his(He think he's Infertile). They always had a rocky marriage.

Since then, he hasn't gone back home. I and my friends are helping him with normal stuff. He is currently living at a place owned by me. He contacted a lawyer, it's seems according to the law in our country a father can't ask for a paternity test after marriage. But the lawyer said he could win if they could somehow prove he can't be the father without a paternity test( I think that's just lawyer speak). He is going to get a fertility test. His lawyer also plans to bring in the actual father in court.

The thing is my gf is really close to his wife. She thinks we( his friends) should talk some sense into him. My gf and I went to meet the wife after my friend left. She and their kids were crying( on is 6 yr old, the other is 2). She's also a SAHM. I felt really bad, but I don't know if I should get involved. My friend called his wife and said he will only talk through a lawyer. My gf and the wife knows we are in contact with him, but they don't know that I am housing him. They also don't know that his lawyer contacted the biological father. I am wondering if I am a bad person for not telling them anything, my friend would be really pissed if I did. AITA?

Edit: I am asking whether I'm an asshole for getting not involved? Not whether my friend is an asshole for leaving his kids( I know he sort of is, but I don't know what I would do if I had to go through this situation, so i didn't say anything to him)

Edit II: I will tell my gf but make her promise that she will not tell the wife.

Edit III: I've decided to not tell my gf, it's hard to keep up with this site, at first everyone was telling me to tell her. Now the majority are saying to keep it a secret.