Step kids help!!

**Venting**I'm not cold & heartless!**

I just had my first biological child in September and he's so amazing and wonderful! I also have 2 step daughters 5 and almost 8. before my son was born I was scared they wouldn't like him, New child, stays with us all the time, you know typical sibling rivalry. Well now they're obsessed with him the oldest one just comes into whatever room we're in and starts playing with him she won't ever leave us alone. I try to be nice and have her do things with us but it's never enough she won't ever leave me alone so I can play with my baby myself or anything she stands there and watches me change his diaper she walks in while I'm giving him a bath, she is always there. when they are at our house which is half the week she's always in the room with the baby unless he's sleeping. I've asked her nicely to go play or do other things and she always says no I'll just stay with you. We get along most of the time but now I don't know what to do I don't want to say go away! And my dh thinks I'm being crazy he says that's their brother let them play with him as much as they want. But I feel like I never get to spend any one on one time with him. And he's my first and maybe only baby. I just want to enjoy the tiny baby phase by myself for a little while I guess.

if you've read all this then thanks! I guess what I'm asking is if there are any mamas out there that are going through the same thing? Or have any advice?