She’s wrecking marriages and not sure what I can do

I’d probably stay well clear of her and tell her why, really.

She’s probably acting out due to any number of reasons, but yeah that’s grim (and so are the men, obviously).

I missed the distant friend bit ,as others have said forget about it .If it was a close friend that perhaps would be different.
Also if you're getting info second hand you may fuck up big time by telling a wife when there's nothing to tell

Oh wait, sorry. You don't know her well enough to have even that conversation with her? Then yeah, nothing you can do about the person you barely know shagging people you don't know at all.

You can't do anything to stop it. Those men are choosing to shag her, it's on them. They choose whether to cheat or not. There will always be someone they can shag if they want to. And you can't start getting involved in strangers' lives.

You can tell her you aren't prepared to listen to her talk about it or you can end the friendship. You can control what you choose to be to her and that's it.

If she's never been like this before and she's a good person, you may decide to tell her you're there for her when she regains her senses and stops; she might be having a mental health episode as a result of her split and she may find it easier to stop if she knows she'll have support. You know her, so you decide.

Exactly. The sisterhood or girlcode would stop most of us being with a man we knew was cheating on his wife. Definitely not defending the men-they are just as bad, but it is not anti-feminism to be worried about her behaviour. And she's putting herself at risk. As others said, you can't control her, but if you are genuinely worried and she's never been like this, you could suggest she sees a therapist.

I am not close enough friend to try and reason with her. What else can I do???

Well nothing. If you can't talk to her then there is nothing you can do..
@ThatCosyMintWriter why do you feel it's up to you to do anything about this?

She could become an affair vigilante.
Hang around pubs, car parks etc waiting to spot obvious unmarried canoodlers.
Follow one home.
Send anonymous letter to inform spouse.

She's not the one wrecking marriages, the husbands are worse...way worse.

Hard to offer a better response than this.

She’s not forcing them to stick it in. Stay out of it

It's the married person who made the vow and owes their spouse loyalty.

She's not cheating they are.

How do you even know this, if she is such a distant friend? Is it via other people gossiping?

Not your circus: not your monkeys.
stay out of it unless you can keep yourself anonymous. You will lose this friendship telling wives and they will shoot the messenger too. Is this really the hill u want to die on?

Sounds like the friendship isn’t that deep so I wouldn’t be giving it headspace. I’d just quietly cut her off, but I guess if it’s not a close friendship she might not realise you’re cutting her off anyway….

If she’s a very distant friend then why do you even care? How is this personally affecting your life?

Unfortunately, and we all know, people cheat. Yes it’s disgusting but there’s nothing you can physically do to stop it.

Put your energy into better things.

Your friend and the men she sleeps with will reap what they sow.

I don’t see what it has to do with you that someone you barely know is sleeping with people you don’t know at all.

Of course it's not right. But it's also nothing to do with you. Just phase her out of your life and forget about it.

There's nothing you can do. Some distant friend? There are plenty of people out there sleeping around with others who are married etc etc. You can't fix everyone. Concentrate on your life.

The men are making a choice to shag her.

Yes it’s wrong but I will say as a single woman that 90% of men who come onto me are married/in relationships. It’s very strange, why don’t single men do it? I say no but most lie about it so you have to play detective and figure out if they are in a couple. She might be in a bad place and just happy with the attention (not excusing it)

Those poor men. Innocently going about their day then forced to cheat on their wives.

Just tell her you don't want to know of her sordid antics and if she persists in telling you ,distance yourself and let the friendship fizzle out.

How on earth do you know the specifics of what a “very distant” friend is up to?

You cant do anything but I could not have anything to do with someone with so little self respect