Do exactly as she says.

You think for a moment, and tell Jessica, who is wearing your mother's body, that you will do whatever she wants you to do. This causes her to smile. "I'm glad you're so willing. I needed you to be willing for me to do this."

You feel a strange sensation again, only this one seems worse than when your sister cursed you to wear only her clothes. You begin to feel dizzy, and fall to your knees. You don't know what's wrong, but Jessica is certainly doing something to you.

Jessica looks at you in your helpless state, and gets an idea. "I like seeing you on your knees. Why don't you stay down there and give me a foot massage?" Without thinking, your body suddenly crawls over, takes off her shoes, and starts rubbing her feet. This brings you to the realization that you just sold your soul to this woman, accidentally.

You now are **** to do every single task that Jessica requests of you. After a few days of being her servant, she removes her original curse from you, keeping her word. Then, only a few hours after putting on your old clothes again, she orders you to wear nothing but women's clothing again, thus making the agreement pointless, but still within the demands you both set.

You've missed several days of school, but Jessica was able to call the school and convince them, as your mother, that you had a cold. You then find out that she has processed the forms to allow you to be home schooled, so you never have to leave the house again. As of this point, Jessica tells you that she loves being your mother so much that she is staying inside of her. She also loves that she doesn't have to do any work while you are her ****.

One night, Jessica slips up in her orders, before going to bed. She tells you to do as you will, and walks into her room. You now are in full control of yourself. You can make a run for it, but if she catches up with you again, she will take control again. Maybe this is a test, and she is seeing how loyal you are, so maybe it is just better off that you stay.