bestie living the baby life through me

So I find it really funny that my bestfriend told me shes "living her baby dream" through me. and actually thanked me for it LOL! shes in college and REALLY wants a baby, but knows she won't finish school so shes waiting 4-5 years. like shes throwing my baby shower, shes spent over $300 on random baby shenanigans for me and is really determined to deliver my little booger butt so she can hold him first lol(i dont have an issue with it)

BUT!

when my mom and step dad ask "can he come visit for a week with us?" "can i change his first diaper? first bath?" i get hostile over him. like no. its my baby. maybe because my friend has done so much for me i think she deserves it and my parents have done jack shit for me?