My sister is dating a sex offender

I would let her know your door is always open if she needs help (if you're okay with that). But while she's with him you want nothing to do with her.

If his crime was in Scotland iirc it was a child that was assaulted whilst asleep.

I would remain in contact, absolutely, but tell DSis I would not see ger with BF.

Has she got kids?

I would cut contact in the circumstances you describe.

As disgusting as he is, your sister has put herself in a dangerous predicament. I would remain in touch simply so she has somewhere to go if things turn nasty.

I dated someone who had a criminal past, I knew a little about it but not the full extent. He hooked me in then it was so so difficult to leave, it took me several attempts, the police, my wonderful family and six months to leave. Then two years of court to get rid of him fully. If my family didn’t help I may have still been stuck in that life.

its so difficult for you I’m in no way minimising but let her know she has an out with you whenever, however she needs it.

YANBU at all. It shows she's got really poor boundaries and is either really naive.... or really dangerous. I'd go with naive so depending on her mindframe I'd probably go low contact and not no contact

Around 2 years ago my sister went out with someone who she knew was awaiting court for abusing his cousins whilst they were children. She stayed with him up until he was found guilty in court and the only reason she didn't continue a relationship with him is because the rest of the family went absolutely mad. She'd been secretly engaged to him too 🤦‍♀️

I went NC with her as she hadn't told us he was due to be in court/ what he had done and she had absolutely mithered me to let her and her boyfriend take my DS out on their own. After he was found guilty and she ended the relationship she denied to the wider community that she had ever known what he had done and also used what he had done in her music career portraying herself as a victim

I would be disgusted too and would wonder why the hell is wrong with my sister to make such a poor choice.

I think I would minimise rather than cut contact with her. I suspect she'll need your support at sone stage when she realises what he's actually like.

Drunk or not, the intent must have been there to some extent. I would keep the lines of communication open with your sister, he sounds dangerous and you may need to help her or advocate for her. In terms of having her in your home, or visiting hers, YADBNU.

I can’t imagine you’ll get many people who don’t agree with your approach. How has your sister responded to you?

No absolutely not I wouldn’t want to be around someone like this. I understand you cutting your sister off as well but try and keep some line of communication and relationship with her just in case she needs you. But other than that I’d steer well clear.

I'd stay in touch with her, she may need it. But i wouldn't be having anything to do with him at all. So see her outside her house, WhatsApp, phone etc.