(expressed, inviting consent - or possible rejection)
"Mmmmm, mmmm", (with a parting of the thighs)
"Excuse me madame, has anybody j*cked off in your panties lately and returned the goodies to your dresser as a special surprise? You liked it, didn't you? Yes you did you little devil. Would you like me to do it in the near future (without your immediate prior knowledge) and for me to leave the goodies for your perusal/arousal at a later date?"
(express consent requested with consent once given, taken as implicit for future actions matching desciption, but with a degree of poetic license allowable in performing the act to maintain the element of surprise and joy on the part of the female)