After the events of BG3, I'm picturing :
Gale cooking in his tower in Waterdeep. Arabella is studying a book about the Weave on a table not far from him, so he can answer her questions (she is a bit bored, she prefers action). Tara is "sleeping" on the table, her tail swaying to bother Arabella's reading.
Outside, Selene is teaching Yenna the art of combat, under the vigilant eyes of Grub. The girl was always impressed by Selene capacities when she was training in the camp. The paladin shows patience and kindness in her teaching. And of course, Scratch is always looking for... scratches. The owlbear cub has grown up, but he still lives with them. Gale is quite happy to see his tower full of life.
Yenna calls Selene and Gale Mom and Dad, she also considers Arabella like a sister. For the little tiefling, it's a bit more complicated, but she will also consider them as her family.