She looks around for her missing panties while undressing...

"Maybe they fell...." You hear her say as she undoes the button on her jeans... Your eyes open wide with the realization that this is it! You quickly pull down your own pants, to horny to care as they hit the floor silently... You feverishly wrap Sarah's panties around your achingly hard dick and begin to jerk off while your sister undresses... It takes all of your willpower not to cum then and there! Sarah allows her pants to fall to the floor before stepping out of them and pulling her shirt off... You can see her large tits, barely covered by the thin material of her bra, her nipples poking through... You feel your breath quicken as she turns to face away from you and bends over to look under the bed! Thankfully you hid in her closet!

"Dammit..." She mutters, feeling under the bed with her hand while giving you an ample view of her equally ample ass... Your pulse is racing as your hand slides her panties up and down yoyr dick, bringing you closer and closer to the inevitable end...

Sarah gets up from her hands and knees and shakes her head... "Shit... Guess I'll have to find something else..." She turns and heads back to her dresser, unclasping her bra and letting it drop to the floor as she walks... You can see her large tits reflecting back at you in the mirror, and you're struggling to hold back the tide of cum...