I used to be just like her. It's her insecurity speaking. When I was younger and I caught my boyfriend masturbating, I felt crushed. It made me feel as though I wasn't satisfying him. I took it personally and even made him promise not to do it again.
At the time, I didn't know any better and never discussed it with anyone. It wasn't until I was older and more open sexually that I found that nothing could have been further from the truth. My self-esteem had grown and I was open to discussion.
Now?
Sometimes I love to watch him masturbate over me ...