Go home

You: "I´m not sleeping on the floor again, my back is still killing me from the last time." You say while Alyssa has Sid´s cock deep down her throat while she fondles his balls, focused on coaxing even more cum from his balls.

Sid: "mmmmuuuhhh....yeah....suit yourself...this will actually be a good exercise....leave now, and you have to trust Alyssa to not let me fuck her pussy, without you here to stop us."

You: "Oh...."

Alyssa removes Sid´s cock from her mouth with a plop sound: "Trust me babe, I´m just gonna swallow his cum and then go to sleep...."

Sid has his hands behind his head, smiling as his cock enters your girlfriends wet warm mouth again. "Trust your girlfriend, Matt..."

So you do, against your better judgment, you close the door on the two lovers enjoying each others bodies to the fullest. Sid moaning as you close the door.

After an hour or so, you are home. You get sent a picture of Alyssa, her mouth is open, but there is no cum. It has the caption: "She swallowed all my cum! Or...is it all deep in her pussy...? Guess you'll just have to trust her!"

Your stomach twists and turns, and your mouth turns to cotton. Could Sid have cum inside her pussy? No way, Alyssa wouldn't do that...

In Alyssa's room...

Alyssa: "You sure about this, Sid? I don't feel so good about going behind Matt's back..." She's on her knees, Sid just snapped the picture for you.

Sid: "Trust me, Alyssa. This is for his own good, to open up more sexually towards you...you want that, right?" Alyssa starts kissing the head of his cock.

Alyssa: "Yeah..."

Sid: "Besides...you need to learn how to have sex..."

Alyssa: "You're a great teacher...." She says as Sid's cum leaks down to the floor from inside her now no longer virgin, unprotected pussy.

Back at your place...

Dad calls, demands you come help him with a project at the house. You can't exactly deny him, so you go. He says it should take a week, Alyssa is obviously disappointed, but she understands. You call her on the phone...

Alyssa: "Don't worry, babe. I'll just continue the lessons with Sid..."

You: "Yeah...any chance you could stop the lessons, for now?"

Alyssa: "Sid says that's probably not a good idea. Besides this is a good exercise in trust. I really appreciate you trusting me with Sid's naked cock always around."

You: "I'm not worried about you...It's Sid that I don't trust."

Alyssa: "He's....a perfect gentleman...uhnn..."

You: "What's wrong?"

Alyssa: "mmm... nothing...Sid is just....giving me...a lesson..."

You: "Oh...is he fingering you again...?"

Alyssa: "Something...like...ughhmm....that...so big...talk to you later...babe..."

In the background you can hear: "your pussy is so tight...." And then Alyssa hangs up...

You're pretty sure that sounded like sex...but you trust Alyssa to resist Sid...you have to.