You stare at Mark for a moment your body screaming with desire till suddenly something seems to break inside you, lust sweeps through you like a tidal wave as you move to wards the bed. With out thinking about it you push your chest out feeling your breast strain against the thin material of the sheet. "Are you sure thats what you really want?" you ask in a soft breathy voice. As you look at your friend with hooded eyes you can see cock bulging in his pants, just what you were hopping for, letting the sheet slip to the floor you push him gently back on the bed and begin pulling of his pants. Ignoring Marks protests you straddle him and start hungrily kissing after a few moments he kisses you back and you shiver with delight as his strong arms slip around your waist. "Please. Fuck me!" you beg as your friends hands roam over your hot new body squeezing your firm tits and ass. Mark reaches down and does something you can't see to the chastity belt it clicks and comes free in one motion finally releasing your hot dripping pussy. Sighing happily you lift yourself up and impale yourself on his rock hard cock. You close your eyes and lose yourself in the strange wonderful feeling of being filled, of being fucked completely as a woman. In minutes your hips start to buck uncontrollably as your first female orgasm surges through you leaving you drained but satisfied.