Ok so before I forget
Headcanon
Pipers dad Jason's mom and Tony Stark all know each other
Jason's mom was a famous actress
Pipers dad is a world famous actor
And Tony Stark ......for I have to explain???
Tony constantly had parties to which he invited famous, rich, important people or people with connections. As famous actors they would have most likely been invited to at least one. Or considering the fact the (I forgot how to spell her name) was always at parties and so was Tony they would have met at least once. So they all know each other good day