My two boys 9 & 13 live here part time (when they are not with their BM) they are talkative, upbeat and "zaney" 

....but the SD18 is here full time. 

Her loser (substance abuse) dad doesn't pay towards anything for her (neither do his parents)

She is pretty much a "shut in" she talks in whisper to her mother  and barely talks to me. She sleeps til 3pm in the afternoon. 

She's been offered but doesn't go to therapy for her anxiety and depression.