I don't think I've ever played Liberty as a central character, although she's been a supporting character. I have four saves:
1. I don't remember what happened to her in my first save.
2. In my second save, the whole BFF household died out without my having done much of anything with them.
3. In my third save, the BFFs are a secondary household attached to my 100 baby challenge. First Travis fathered twins, Spencer and Scipio, with the first matriarch. Then, Summer married one of the twins' older half brothers and moved out to his cottage in Windenberg. Then, Travis and Liberty married each other and had a daughter Mya. Then the twins grew up. Spencer, an aspiring software programmer, moved in with Travis and Liberty. He ended up raising Mya after they died. She grew up to be a chaotic mess.
4. In my fourth save, the BFFs are a secondary household attached to my aspiration legacy challenge. Both Travis and Liberty married into the werewolf wing of the legacy (descended from the Emissary of the Collective). Their spouses are cousins. They each have a kid, but I don't remember if their kids are werewolves.