Rainbow,
Are your feelings of "not wanting T to have sex with that guy" much different than a child being/feeling excluded when the parent's bedroom door is shut...and we, as children, weren't allowed in? Couldnt a little bit of jealousy be "normal?"
Also, commenting on age....if there is a need to be filled... I feel the need may exist no matter our age.
Hope you and T figure things out. I can relate to a lot your posts.