I've two grown children with my wife number 1, She made it difficult while they where young for a visitation (using the kids as a weapon just to hurt me) and went threw many court room battles with the woman, which only hurt my relationship with our children.

My youngest daughter's 9 with the last wife ... We've gotten along famously, I truly don't have any issues with my daughter mother & She let's me have her more than 60% of the year.

Now, after the bad taste my first two's mother left me with, I'm grateful that I'm so close to & have gotten so much influence and time with my youngest.
Her mother (I'll call "T") & I haven't had a bad word between us, but a new problem has developed and I want some serious advice?

"T" had an older child with a friend of mine (my daughter's 1/2 brother) and then after her and I split, she had ANOTHER 1/2 brother with a different guy.

"T" left the third guy last summer, he was a cool guy. Then this is where it gets very "SPRINGER" she has hooked up with the town's infamous 'trouble maker' (he's in and out of jail, always for violent acts)

I've never paid any attention to who this woman dates or what she does, we talk about our daughter and THAT'S IT.
Were 'friendly' but FAR from friends!

Last week, My friend ... (who's the father of the "T"s 13 y/o)
-Comes to my house for a "serious talk about our chalderns mother."

To sum it up, He's talked to the other daddy involved with our children, and is concerned about our mutual Ex's new boyfriend. (ugh)
Yes, I'm concern that the guy is in jail more than I'd like to see my daughter being around. I'm concern that WHAT he's done to go jail those times (violence) But my mutual ex sharing friend really wants to get all three of the fathers together and uproot them from their mothers home.
So advice?