I like to imagine that the girl in the left is thinking something like this: "Why is he using the slave as a cumdump while I'm here? Hmpf! How indecent! Even though he should have us both serving him as slaves as the master of the house!" while the one in the right is thinking: "I don't know how to feel about my own adopted son having a sex slave and even using us as onaholes, but I can't help how good it feels to have my son's huge white cock turn me into his whore! He's even naked in the living room while his pet worships his dick!"