Will having a live in boyfriend affect my chances of child coustody?

[trinity]

I have been living with my boyfriend (engaged last year) for 2 years now. My soon to be ex-husband (we have been seperated over 4 years now) just moved in with his girlffriend about a week ago. My boyfriend has no criminal record, no drugs, extreamly steady job and has been supporting us himself (including soon to be ex husband's child) soly on his own and held a stable clean living home for two years. I do not beleive my soon to be ex-husband's girlfriend has any criminal backround nor do I wish to imply she is a bad person, I do not know her. Since we both now live with eachother's boy/grilfriends.. will it look as bad on me since I am taking him to court? I am home with the kids (both my boyfriend's choice and mine) to be a stay at home mom. We beleive that is the best way to raise the kids. My soon to be ex-husband ralry ever sees his child if that helps. Does it matter what state we are in? Were both in Arkansas.