Shermie and you were dating for eight months now, and your birthday came eventually, so Shermie, knowing you have a thing for bigger women, decided to surprise you on your birthday.

At the party she prepared for you, she came in in her usual sensual manner and picked an air tank from a corner.

Shermie: Watch this, darling~

She coos before putting the hose on her mouth, inflating herself so big and spherical that she resemble a weightless massively obese woman floating around. Once she removes the hose from her mouth, she looks at you with a playful smirk, her inflated body rocking up and down gently in the air

Shermie: Happy birthday, darling~