You get a chastity cage

Isabella pulls out a plastic device. "This will keep that stupid cock of yours under control for the next couple of days. Before you put it on, you're going to need some preparation. There are some clippers in the bathroom. Go trim your pubic hair so it won't get caught in the device."

You crawl into the bathroom. Since Isabella gave you an order to do something, you're able to open your hands and hold the electric razor you find on the counter. Cropping all the hair on your groin feels weird, but you do it. When you finish, you crawl back to the living room and sit with your butt on the floor, but your hands straight down to the ground, like a dog sitting in front of its master. You don't realize until it's too late that this pushes the tail/buttplug harder into your ass.

Isabella laughs. "Alright! You look nicely groomed now. There's just one more thing. You need to be soft when you do this, so go ahead and jerk one out."

With no hesitation at all, you grab your painfully hard cock and start jerking. You stare at Isabella's breasts openly.

"Yeah, jerk it, bitch!" she says. "You're not jerking because you want to, you're jerking because you have to! Because I told you to! You're my bitch! Now cum!"

You explode onto the floor almost instantly. After going so long without permission to cum, it didn't take much.

"Now do it again!" yells Isabella with malicious glee.

Your pent up need was so great, you didn't even go soft. You jerk off again, getting very worked up within seconds.

"Do it!" yells Isabella. "Do it! Cum! Come on, you little bitch, cum! CUM! FUCKING CUM YOU PIECE OF SHIT!!!"

It takes a little longer this time, but you cum hard. You're panting in exhaustion as it spurts out on the floor. You keep panting as your cock starts to deflate. Isabella throws you a napkin and tells you to clean up. Then she gives you the lube bottle and tells you to put some on. Finally, she gives you the little plastic device and tells you to secure the back ring and slide on the cage. You do it, snapping the device into place.

"Good dog!" says Isabella. "I'll text Emma the combination so that she can return your cock to you after I give you back. For the next couple of days, you're my bitch!"