Let's make this for tonight only

After careful thought, you say with a tone of seriousness, "We really shouldn't make this a regular thing. It's just too risky. If Suzy catches us, I have no idea how she'll react. We both love her too much to do that to her."

Her face falls in disappointment, but you can tell she understands. "You're right. She may never forgive me if she found out, and I don't want to have that kind of guilt."

Not wanting this night to end on such a sad note, you curl your finger under her chin and tilt her head up to meet your gaze. "That means we need to make every moment of tonight count."

A playful glint suddenly sparkles in Diane's eyes, and her hand slips down to your cock which is slowly growing erect again. She gives it a few playful tugs and than moves down the bed and rests on her stomach in between your legs. Looking up at you, she brings your half-erect penis to her lips and slowly draws it into her mouth. A wave of pleasure washes over you as her lips hug your shaft and her tongue swirls around the head.

You lean your head back and sigh as your sister-in-law, whom you've just freshly fucked, gives you an exquisite blowjob. She continues to expertly suck your cock in earnest. Gradually, you feel yourself inching towards the point of no return, your balls begin to tighten, and you decide it's time to warn her.

"I'm going to cum," you manage to say breathlessly. She looks up at you and smiles as best she can with a mouth full of cock and just keeps sucking and stroking your shaft harder and faster. You let out a moan as your nerve endings explode. Your orgasm shudders through your body. Diane's eyes widen with surprise, obviously not expecting you to ejaculate so forcefully into her throat. She keeps her lips sealed around your shaft though, making sure not a single drop escapes.

Once your orgasm begins to subside, Diane lets your cock slip out from between her lips. She opens her mouth to show you the pool of cum resting on her tongue and then closes her mouth to swallow it. She swallows hard and smiles up at you.

"I wanted to taste your cum again, and this time I wanted to catch every drop," she says as she crawls back up the bed and lays down beside you. She talks with you about how wonderful this evening as been as you both slowly drift off to sleep.