30 year old SD is making life hell

[thisldo]

Been with DP 12 year. He has a DD who is 30. She's never accepted me and never accepted DP other girlfriends. So nothing personal. ( DP and his ex split when she was 4) I have learnt to live with this but now she is pregnant and made it quite clear she doesn't want me having any involvement with her baby. This is fine by me but I am starting to see it's going to be very upsetting for DP. My thoughts are maybe I should end this relationship so he and his grandchild can have the bond they deserve. Wwyd?

She has told him he can't see the baby with or without me.
It's a case of if you do ( whatever the demand is at the time ) you can see the baby. DP said he's sick of all the unreasonable demands and has started to say no to her so she's decided he can't see baby.
This has escalated and seems to not only be about him being with me. It's her wanting control and he's finally after 30 years had enough.

Good for him.

Wow, OP. Good for him.