The proposal

"Hey, babe" Luna sits across from you in the living room. She's blushing a little, and seems somewhat embarrassed. "I have... something to tell you."

"What is it?" you ask.

"Remember my friend Celia? She went to high school with me. I've told you about her. Yeeaah... I used to have a little crush on her. No big deal. Every girl has a girl crush!" She blushes adorably. "Anyway, she... she came today while you were at work. Yeah, she just wanted to talk, and... well... She told me she knew about my... condition." She rubs her crotch slightly, and you can see her big cock, although it's soft at the moment. "Yeah, I tried to keep it a secret from everyone, but...! Well, she said she was interested when we were studying and... She says she still is."

You're surprised, but you don't know what she means exactly.

"I said no, of course! You're my husband! No amount of teenage crush would make me cheat on you! I just wanted to let you know, in case you happen to hear something..."

You tell her about the times you two have fantasized about her using her big futanari cock with another girl. She shrugs and looks away awkwardly.

"I don't know... Are you sure? I admit it... It sounds fun. Would you be ok with it? Yes? Well..." She's so flustered. "Ok, I'll do it! Gosh! I can't believe we're...! We'll be... Ah, some rules, of course! I'll wear a condom. Yes, definitely. This will be one time only, as well. What? If I like it? I don't know... You're right, we'll see later... Baby... Yeah, I got so horny as well, maybe we can..."

You don't need her to finish the sentence. You jump onto her and kiss her. Soon your clothes and hers are out of the way, and you're fucking your wife's petite boy raw. She's put on a condom —extra large, of course— and her huge futanari cock sways uncontrollably to your every thrust. You imagine soon it will be her turn to pound someone else the way you do with her, and it makes both of you so hard. You fill her pussy with your seed while she fills a condom. Like other times, it's so full of semen it looks as if it were to burst.

"I'll call her later... And we'll do it tomorrow..." She says while still enjoying her orgasm.