Living with the parents can be a big bummer for masturbation, particularly when they have an open door policy for your room, LOL. As far as you pleasuring yourself in bed, I have to agree that she shouldn't have gotten upset by what you did. Usually if my boyfriend is feeling frisky and I'm don't feel the need to be pleasured myself, I just get him off. And if I'm really tired, the best solution for everybody is for me to give him a blow job and then jump him in the morning when I'm feeling better rested. If she was that upset, then most likely she assumed you weren't fantasizing about her. Because, believe me, there's nothing more flattering than for a guy to let me know that when I'm unavailable, he's thinking of me when he masturbates. I can't imagine any girl being upset by you masturbating if she knows you're thinking about what you two will do the next time she's in the mood.

__________________
Thank you, sir, may I have another?