What does she have planned?

You have to survive 15 slaps to your balls…without making a single noise.

“Well, sir, or should I say slut, since you have a full day ahead of you trying to find out who in this large house has the key to your cage, I’ll go easy on you. I’ll set you free from the bed if you can take fifteen strikes from me to your precious little boys? Deal? If not, I’ll just have my way with you anyways and leave you here for a later time, or another **** to come help you. Don’t say anything, just nod your head if you agree.”

You silently nod your head, knowing you could be trapped up here all day if you didn’t submit to **** 1-, you mean Mistress' demands. She cackles and moves over to one of the closets in your room, and pulls out a riding crop. She then mounts your bound form and begins caressing your balls, making you want to get hard, but can’t as you are still locked in a chastity cage. You are relaxed and enjoying the shapley ass of your current Mistress when she slaps your balls. “One…” SLAP! “Two…”