I agree, it is about standing up for yourself. Why does she want to share a bedroom with you if she is with OM? My H certainly hasn't. Again, not sure how you CAN enforce the boundary, but I think if you use Wonka's script she won't have much choice.

Me-44 (45)
H- 50 (51)
M-'96

S-18(20)D-15(17)D-12(14)

BD Feb 2014 (he works overseas)
home Oct(sep rooms)
(EAs possible Pa's unconfirmed)
insists wants D through July 2015
no more talk of D since