DD13 wears quite short shorts and a support crop vest around the house, she says she it too hot otherwise.
Is this too little? What do your teens wear around the house. DH has issues with it, I can't see anything wrong with it.
Also, she eats at the table with her legs on the chair and won't sit properly when asked. She sits correctly at restaurants. She's very tall and skinny and I think she finds her posture difficult to manage and her core strength is low. Again, DH has issues with it but I think it will come with time and she is able when the situation needs it.