Unfortunately not an option, as that’s implied. The pair have set up a kind of mandatory silence when it comes to their actions. Anypony that dares break the chain will have their secrets and embarrassing moments revealed one after another until they cave. Then they’re forced to share secrets to them about others, furthering their control. It’s incredibly cruel, but not something any one pony can fight against. Maybe one day everypony can stand against them both at once and end the cycle, but that’s obviously not today.

You toss away any remaining scrap of pride or self-worth, drop to your haunches and knees, and with tears in your eyes beg for them to not tell. There’s an almost evil glint in Silver Spoon’s eyes, and you feel that she’s ready to enact her ultimate revenge and strike you down at your weakest moment. But it doesn’t remain long.

Diamond Tiara approaches you and lifts up your head, “Poor, poor Liza. You must think us awful for bringing you to such a lowly state.”
Silver Spoon snickers, “Yeah.”
You’re surprised to find Diamond Tiara’s hoof extend to help you up, “You should come with me. Just the two of us. We’ll hang out. Play some games. I’ll show you I’m not such a bad pony.”
“Yeah…! Wait, what?!” Silver Spoon’s face is awash with confusion. Admittedly, yours probably is as well.

Diamond Tiara puts her foreleg around your neck and turns to Silver Spoon, “We’ve hung out together since school. I don’t have to foalsit you all day, do I?”
Silver Spoon is completely speechless. If not for the terrible feeling that this is somehow going to get much worse for you, you’d almost be enjoying yourself.
Diamond Tiara rolls her eyes, “Oh stop. It’s not like I won’t see you tomorrow at your birthday party. I just need to spend a little time with Little Liza here. You understand, of course.” She turns around, taking you with her, and you both walk away without so much as a goodbye. But under her breath, you hear Diamond Tiara whisper to you, “That’s right. Keep walking. Don’t look back and don’t say a word.”

There’s that sense of dread again.