Grace has ideas

"Oh God, I don't believe you," she purrs. "That was so good...so fucking incredible...watching you fuck Sally was almost as good as being fucked by you" She squirms against you, her mouth nuzzling your skin happily.

Your heart is still hammering in your chest and there is a dull but satisfied ache in your cock and balls. .

"You're the incredible one, you and your sister both," you tell her, kissing the top of her head. "you got me going like I was twenty again."

"Mmmmmm and you fucked me so good," she murmurs. "The last one was the best. I just kept coming and coming and coming. I've never done that before. I thought I was going to die it was so good." She giggles softly and kisses your throat again, then lifts her head and squirms forward to kiss you on the mouth with lazy hunger.

As you kiss, you hold her as she breaks the kiss and strokes your face, looking up into your eyes with happiness.

"I want to stay here," she says with a sultry giggle. "I want to stay here and make love all afternoon. I want you to show me everything. I want you to make me come like that again and again."

You give a rueful laugh and kiss her again. "I'm not a young man, Grace. I'm not sure I'm up for that."

"Mmmm you already did it more than once, that's more than Lance could do," she states firmly, touching the chain at her wrist with a flick of a finger. "Most times he was done before I was even close, and he'd get mad if I tried to finish myself." She blushes prettily. "Do you know I almost came when I was blowing you. I loved looking at you and knowing how much I was exciting you. I do excite you, don't I Mr. Carter?" she asks in a tone of teasing softness.

"Very much Grace, very much indeed. Maybe while we're like this you should call me Mason instead of Mr. Carter."

"No. I want you to be Mr. Carter. My teacher. Who is teaching me all about biology," she giggles lewdly, wriggling against you and hooking one of her heels behind your knee. "You will keep teaching me, won't you Mr. Carter?"