Fingering expansion

As Sandra fingered herself her pussy gaped open to fit a couple fingers in more comfortably. As she kept fingering herself more fingers fit inside. The feeling was explosive. With her eyes closed she fingered more and more, deeper and deeper. A hand slips in then her wrist, then her forearm. Eyes suddenly wide she pulls her arm out and gasps at how large her pussy had grown. Still she fingered the folds grasping and clutching at expanding flesh. The warm juices flowing sticky and warm on her hand and out filling the air with a sweet smell. Excited more by this she grasps at her clit. Massages more folds as they grew full and hot. Moaning and writhing on her swelling mound. That's when she noitced it had grown too big to take her hand out from under it. She was trapped. Wriggling and bucking as she spilled out her juices. All she could do was hang on till her housmate Grace got home and could help her up.