Hi there!
It's tough to get around body tissues sometimes but remember that working larger muscle groups will help your body to maintain a higher level of metabolism - which will encourage fat burn while you are doing nothing.
larger muscles groups include - inner thigh, buttocks, front and back of thighs. Your stomach is also important. Here's a great way to get an ab workout without anything but you!

Lay on the floor on your back.
Rest the soles of your feet on the floor so that your knees are slightly bent.
Squeeze your buttocks and vaginal muscles really tightly and slowly pull your pelvis up off of the floor. Repeat until you feel the muscles fatigue slightly. (should feel in lower abs and pelvis)
For the rest of your tummy stay in the same position on the floor and press your ribs towards the floor so that you are flattening your tummy and kind of curling a little bit....
Try these and let me know how they go!