Invite Sayori to join in

You glanced between the two girls. "Well... I know you said you're more into bondage, but if you want to join in with us, you're welcome to... Assuming Monika doesn't mind?"

Monika tensed for a moment, then quietly sighed. "Alright. I liked having all of your attention, but it wouldn't do to neglect my club members."

"Yay!" Sayori cheered and hugged Monika. Your eyes were drawn to the sight of Monika's breasts squished between them. Then suddenly Sayori had let go of Monika and was hugging you. "Thanks, Player."

"I'm being thanked for wanting to see two cute girls naked instead of just one." You chuckled. "Well then, if you're joining us, it's your turn to strip down."

"You're not going to let me see that cute butt of yours first?" Sayori gave a fake pout, then slipped off her jacket.

Monika smiled, even if it didn't fully reach her eyes at first. "If I'm not the only naked one anyways, then I agree that there is an appeal to Sayori's idea."

You gave Monika a quizzical look. "If you're not the only naked one?"

"As I said, I'm turned on by humiliation." She shrugged. "When I am the only one to be naked, it increases the humiliation, so it turns me on more." Monika gestured at Sayori who had already gotten her shirt off in the time you were looking away and was fumbling with her bra straps. "But I'm not the only one, so..."