Toxic Drug Addict Dsis and going NC

[Starlive23]

God where to start. I'm not even sure why I'm typing all of this out, maybe to vent? I've kept this to myself (within my family) for so many years.
My sister is a drug addict (crack and cocaine) and has been for about 15 years at least that I know of.
Since then I've got married and had children etc.
My sister steals everything from my parents, stole my wedding ring, stole my kids bikes, my daughters christening bracelet...you get the gist.
She lives with my parents who just seem to be unable to see how she manipulates them and have said they will never turn their backs on her.
Am I unreasonable to want nothing to do with this anymore? I'm 8.5 months pregnant, have worries of my own and I honestly cannot go through the pretence of it all anymore, her changing, me believing it then her letting us all down again.
I've stopped my DC going to my parents house (they act as childcare so we are in a childcare support bubble). I've said they can only watch my DC at my house. This has caused a lot of issues particularly for my dad who thinks I'm not being fair.
I can't tell anymore if I am or not.
If you made it this far, thank you.

I can’t believe you are even questioning yourself. She sounds like a complete lost cause and your parents are enabling her. Let them get on with it. Your priority is safeguarding your DC’s from this.

I think its all the constant arguments with my dad are wearing me down and making me doubt myself.
I've told my parents that my sister isn't going to be allowed to see the new baby when she arrives and that has caused some major problems.
I'm just so, so tired of begging her to stop. I feel like I can't do it anymore but my dad says family never stops being there for one another.

I wouldn't send DC to my parents in this situation either OP. I'd clearly explain to your parents that your children are your priority and your sister is not. You're happy for them to be involved with their grandkids but you won't have them around a drug addict.

Your dad says family don't stop being there for each other, which to an extent is true, but that is not a free pass for family to behave how they like. I would simply put your foot down with your dad and explain that you love him and your mum, and are happy for them to continue their relationship with your DC but the line stops there. It's your choice as a parent who your kids are around and your own parents cannot dictate to you who you are involved with.

What a shit situation OP. I'm assuming you never got your wedding ring back?

@Babybee93 no, never got it back. She gave it to a dealer so I didn't even have the option of buying it back from a pawnbrokers.

Thanks both, very very refreshing to hear other views.

I actually feel a bit better! Thank you.