Bit of backstory here and will try to keep it as short as poss.
Good friend has had very messy divorce with partner over course of 3 years. Both parties have got police involved for variety of things but nothing physical. They have kids and friend has left the house 6 months ago to live with parents.
In that 6 months, friend has been “dating” multiple people they meet on nights out, lying about multiple things to friends and ex partner. It’s been hard to not get frustrated at this as most of the lies are seemingly pointless, ie I'm just at the shops, when people have seen them somewhere else. This has made me very concerned about them but also what to believe. They called me a week ago needing help as ex partner has them arrested and told me they hadn’t seen the ex for over 2 weeks, but 2 friends have said they had seen them together and one had caught them in the act in back garden a couple days ago.
Heres the kicker, the friend over new year introduced us to their new partner. Over conversation they have been talking for a few months, dating for 2. They seemed absolutely lovely, told us about their kids and has said they are glad to find someone so nice and honest as have had some horrid relationships in the past.
Now question is, what do I do? I feel completely torn, do I say nothing and let this poor person and kids potentially find out my friend has police record and been seeing others. Or do I find some way of getting this person to be more cautious.