Bow: Looking to forward to having lunch with your sister, Scoots?

Scootaloo: I am! Oh, and, Mom?

Windy: Yes?

Scootaloo: You said somepony else was coming, who is it?

Windy: Oh, well, it's… Stops when she notices something I think that you're about to find out, sweetie.

A mare with pink fur and blue mare walks over to the trio

Firefly: Hi, Windy!

Windy: Hiya, Mom! How are you doing?

Firefly: Just fine, dear. Bow, great to see you again!

Bow: Likewise, Firefly.

Firefly then notices Scootaloo

Firefly: And who's this little one then?

Windy: Mom, meet our daughter, Scootaloo! Scootaloo, meet your Grandmare Firefly!

Firefly: Ah! So, you're Scootaloo! Your mother and father told me all about you! It's so nice to meet you at last!

Scootaloo: Nice to meet you too, Grandmare!

_

Headcanon: Scootaloo is adopted by Bow and Windy and Firefly is the mother of Windy Whistles, the mother-in-law to Bow and Rainbow Blaze and the Grandmother of Rainbow and Scootaloo.

Note: This is loosely based on this: https://www.dailymotion.com/video/x4irzgl