I'm going to give you some serious advice for a second.
Do not date anyone that is friends with your family.
It goes bad and the entire thing turns into a soap opera.
Don't do it.
I have turned down a lot of quality pussy because they were friends of my brother or sister.
Hell, I once turned down a fine MILF when I was in my early 20s because she knew my mom and I wasn't putting my family in the middle of my bullshit.
Do NOT do it.