Kristen has one of those rare bellybuttons that builds up in it's sensitivity AND remains sensitive and ticklish. Here you can definitely tell the sensations have built up quite a bit and it's really getting to her. She bites her lower lip and the belly suck in reactions get deeper and deeper. Those nerve endings in that inbeie are being stimulated right to the core.

Kristen has one of those rare bellybuttons that builds up in it's sensitivity AND remains sensitive and ticklish. Here you can definitely tell the sensations have built up quite a bit and it's really getting to her. She bites her lower lip and the belly suck in reactions get deeper and deeper. Those nerve endings in that inbeie are being stimulated right to the core.