Jealous of my girlfriend using her "toy"?

Ok.. so recently my girlfriend told me she wants to hold off on any more for a while or at least till I get my own place... well I'm going in for surgery soon.. and I won't be able to do anything with her.. let ALONE get my own place. But anyways.. my girlfriend and I were talking tonight over txt and she says she's "jerkin" and to send her dirty photos. So I did. She was using the "toy" I got her a while back. I'm not sure why.. but this makes me jealous.. because she still wants to get off... just without me. UGH! It's NOT like the is bad either... I finish her several times a sitting and she has even d several times. So I know it's not the . What does it mean when a girl doesn't want but yet still wants to get off by herself? Ugh.. I don't understand it. It makes me upset haha. Help!