There's another fetish party next week, bigger than the last one and I'm assuming her BF will be there this time (unless they fight again, but that's unlikely as I presume they're in honeymoon phase of the abuse cycle)
I wasn't gonna go then by time I asked her about coming it was already sold out. Asked her again earlier and she said she'd put me on the guest list.
Face to face time.
EDIT: 3 hours after original post.
She isn't FB friends with the BF anymore. This coming a few days after they were on holiday for a week and she was uploading pics of them together. It's not an unfrequent occurrence, she says it's to stop him messaging her all the time after a fight.
I expect, and always have expected them to break up eventually even before I knew about the violence.
Maybe it's just temporary, maybe it lasts until after the next party, maybe it doesn't.