...”If that approval is slow in coming, she throws fits and threatens to deprive them of her presence”....
She is transferring her guilt.... her refusal to accept they disagree with her behavior is the very thing she is refusing them...to disagree and not accept her behavior.
Not uncommon for immature people to hold a hammer over family members, also not uncommon for homosexuals to be highly emotional or touchy feeley people. If indeed she is really a homosexual. There is a difference.
Some are not really homosexuals as it’s defined...rather they are experimenting with the behavior as one would other sexual encounters in today’s free sex society.....if they’re young it’s often simply rebellion, or a means for attention.
You mentioning ‘she gets her way’ indicates that might be the problem....some push the envelope of tolerance just to keep the family in a heightened state....which in itself is a “buzz” for them.
Either or she is controlling the family...and knows it.
Absolutely agree with everything you say.
I don’t personally believe the girl really is a lesbian. She is very attractive, and she dated men up until the point she suddenly “decided” she preferred women.