Do yall think Ava's last grandmother is her paternal or external?

As the title states, do yall think Ava's grandmother is the paternal or maternal? Because, either way, that raises a lot of questions. She says "we" when talking to Janine about finding a permanent arrangement for her grandmother which suggests she conversed with family. If so, was it Frank? What did that look like, especially because she seems shocked to see him interacting with her in a school setting. If not and it was her Mother... what would that have looked like? Ava talks about truly not having any other family in Philly and on Mother's day, while it isn't explicitly talked about, she attends drag brunch like the rest of the characters who HAVE clearly stated they have parental/mommy issues. Either way, it seems interesting as hell to me and depending on which she fits into, I have questions galore (wouldn't it be so weird if that's how we get more insight on Frank/Ava??!)