Kassy is bored. Mia comes back from the gym downstairs to rest before she takes a shower. Kassy takes the opportunity to look at her belly button that is now uncovered in her gym clothing. Kassy overs her to rest before that shower. She dozes off a bit as Kassy starts to touch and explore her unusually deep belly button. When she is sure that Mia is deep resting she starts to insert her fingers and later nose into her belly button. She thrusts deeper and harder with every second until Mia wakes up to the sensational feeling...