The size difference between mamma & daughter. About the same size difference exists between me & my wife. She's bigger, stronger & much more dominant than me. She 1st strips me, puts me over her knee for a spanking, before letting me nurse on her, (it always got her excited seeing my hiney go from white to pink to red), before soothing me, with her breasts & talking dirty to me as she strokes me off. I know how hot she gets spanking me, so I offer up my naked cheeks, she knows how excited I get, by telling me to nurse on her, as she talked dirty to me & stroke me off or gives me a BJ.