Worst nightmare has happened

My daughter is pregnant SHES 12

I agreed she could have a boyfriend as long as they are always supervised either that's with friends or family well that rule clearly got broken while she stayed at her dad for two weeks she does two weeks here two weeks there.

She's 10 weeks pregnant and wants to keep the baby so her father told me she doesn't know I know yet I haven't spoke to her I found out yesterday I just want to kill her and that Satan spawn that is going to ruin my daughter's life.

She won't even be a teen mom she will be a child mom.

I don't know how to handle this I'm considering just giving full rights away and she can be her father's problem seen as he neglected her so much and let this happen.

I feel terrible for saying this but I'm lost for words I have a 9 month old and a 2 year old and now she is going to expect me to take more time off work to raise her baby?

Any advice please .

Update

We had a family meeting of sorts between my daughter her father and his wife and her boyfriend's parents

After a long discussion

Her father and wife are adopting her baby she will still be the babies mom but won't have custody and will see the baby every 2 weeks still go to school ect

Her life won't be ruined I spoke to her calmly and told her I'd respect her decisions and she and her dad came to that conclusion. the babies father will visit and of course when the baby is older he can be more involved

it's an open adoption

I'll be allowed to be grandma just as much as I would be if she was keeping the baby

Her father and wife have being TTC for a couple years now and no luck so they are both looking forward to raising this baby

My original post now disgusts me I shouldn't of spoke like that but it was written in anger as I only just found out

Thanks for comments and advice I'm hoping my daughter can get through this pregnancy with all out support.