Ticklish Navel and Belly buttom

Description: As you already know mary and nat love to talk about tickling, one afternoon they started talking about the places where they didn't think they were so ticklish, out came the navel and belly button, in this case nat claimed it was a very ticklish place and mary thought not so much.so nat was going to show mary that this place could be extremely ticklish, starting in an "x" position and then in a side hogtied taking advantage of these positions to tickle her belly and belly button many many many times. do you think mary is now totally convinced that she can be very ticklish on her belly button?