That's my wife exactly. We're very very normal, wife is classy and conservative. Not the slut type at all. When we do our mfm fun with our friend it's like she's a different woman. She lets go like I can't believe. Been times he's pumping her, her legs go straight, her body gets stiff and she cums HARD. That's never happened with me. Its like her cum lasts 30 seconds with her grunting and grunting while he pumps her. Its like she has no thought of me watching her go wild at all. She'll cum hard and long under him, he'll roll off and she lays there catching her breath with his jizz oozing from her pussy while she just looks at me.
Its hotter than hell to watch.