Me and my girlfriend have a healthy sexlife we enjoy performing oral sex on each other and having sex. Our foreplay last very long before we engage in sex, i finger her se mastrubates me, an we watch each other matrubate wich makes us so horny. But i told my girlfriend once that i thought of her one afternoon while she wasnt with me and got a very hard penis so i went to mastrubate, she totaly freaked out. She didnt like it at all, so now i mastrubate without telling her, but i feel guilty! I want her to know what i'm doing while im thinking of her! How can i confince her that its okay?