Laying in bed with your gf you decided to ask if she could be a fit granny. Your girlfriend cracked a mischievous smile and hit a hidden panic room switch her dad installed and heavy steel shutters came swooping down over her windows and doors.
Your gf getting up from bed cracked her knuckles the mature naked woman that looked like your grandma grunted and clenched her fists suddenly her muscles began popping up every where. Eventually acquiring definition and a four pack and looking like an aged CrossFit instructor you tried to plead her to stop “ ok that’s firm” but your girlfriend just grinning away showing off her smile lines told you off in a now huskier voice “now now, twerp grandma is not a quitter.” You backed away from the growing elderly woman realizing that it has gone to far you called out you’re girlfriend by name hoping to restore sanity but instead the mature woman surged bigger her saggy breasts lifting and disappearing above pebbled obliques and veiny ridged six pac as her arms passed the 15” mark.
The imposter grandma had become bigger than any male you’ve seen her jaw widened and her cropped white hair became dyed an electric blue straightening down her massive chiseled back she suddenly shot up to ten feel as black nail polish appeared on her veiny hands and feet she struck a bicep pose showing a peak that would rival Ferrigno’s back In his day “ready for grandma?!” Her voice becoming a A deep velvety baritone.
The mature muscle GILF finally stopped growing leaving you with a sense of arousal and fear. There was no escaping her...