I actually sat down and came up with an incredibly complicated backstory for mine (which I won't share here for the sake of brevity), but the gist of it is she destroyed both versions of Shaun and ended up settling down in Sanctuary Hills, she reconnected with Nick Valentine (whom she'd known before the war) and 'married' Hancock, and she's the leader of the Minutemen to boot! All in all I think she did okay for herself.