Yes. And also, your sister can be your best friend.
Your mother or father would have to adopt them. Answer You can make her a sister of the heart. That's it.
Minors are not allowed to adopt.
run on sentence. consider revising.
i think it is
Yes, if the parents of the child (your sister and the father) allow it.
only if your friend's mom is hot
Yes of you adopt it as a baby
Of course if your sister let you!
No but his parents adopt Billy
Her dad finally decided to adopt the homeless puppy. His sister wanted to adopt an orphaned child. They weren't going to adopt the man's excuse.
Nothing. Your friend is dtill your friend and your sister is still your sister. They'll probably break up anyway.
The possessive form is my sister's friend.