She likes you more than her husband.

You patted your lap and Jennifer resumed her earlier position. She really did seem to be accepting this as normal. So normal that she kept watching TV as she ground her ass into your stiff cock. You leaned over and whispered into her ear, “You like grinding on my cock. It really turns you on.”

There was another momentary struggle on her face, but it seemed much shorter than before. Very quickly, she smiled at you and started moving faster. The app was working as advertised, getting stronger with more use.

You took the opportunity to push it further and whispered, “Tell me who has a bigger cock, me or Marcus.”

This one really seemed like a risk, but she whispered back almost immediately. “From what I can feel, yours is much bigger. Marcus's cock isn't very big. Oh my god, I shouldn't have told you that!”

Marcus looked worried. “What are you guys talking about?”

“That's rude,” you said. “You shouldn't ask about a private conversation.”

“Sorry!” said Marcus. “You're right. I'll mind my own business.” He went back to watching TV, although he did keep glancing back.

You whispered some more to Jennifer. “It's okay. You told me that because you trust me. It's okay that you want me more than your husband. You're supposed to have a big dick to satisfy you. You deserve it. Marcus deserves to be treated badly because he's never satisfied you with his little dick.”

Jennifer completely relaxed. Without you asking, she put her arms around your neck and smiled at you. You could feel the skin of her nearly bare ass against your thighs as her crotch energetically rubbed yours.

“Guys?” said Marcus. “I'm really not okay with this.”

“I'm sure you aren't,” you said, “but you're not going to do anything about it. You're just a nice guy. You let me stay here rent free because you're a nice guy. You let me eat your food because you're a nice guy. You're going to let me and your wife do whatever we want without objection because you're such a nice guy.”

“Um, yeah, you're probably right.”

You whispered to Jennifer, “Tormenting Marcus is fun. You like making sure he knows that I can satisfy you more than him.”

Marcus asked, “Would you two like me to leave?”

“No,” said Jennifer to him while still looking at you intently. “Stay. I want you to see this.”