It's hard to tell if the plump love goddess is being pleased or teased or both. Serving Mistress's other slaves can mean either taking them to paradise or making their horny suffering sweetly unbearable. You love being Mistress's toy, being an extension of her, doing whatever she says to do to your lucky victim. Pleasing them is a lovely gift of affection. Tormenting them can help you take out your horny frustrations. But you sympathize with them, too. You know you're making their suffering worse... or is it better? They, like you, have surrendered to the joys of teasing and orgasm denial.
There are also times when they get to act out Mistress's cruelty on you, too. It's heavenly when they tease you, doing whatever delightfully agonizing tortures Mistress tells them to. You're all trapped in Mistress's web of tender torments.