Of course big beautiful girls don't just sit on some unformfortable chairs or rest their feet on a hard floor. It's what they've slaves for! Of course this is very hard for the slaves, carrying the weight of their heavy mistresses for hours. But a real lady doesn't care about their pathetic objects.

The slave's just have to stand the pain if they want to serve their mistress in the future and don't want to be replaced by some stronger and more reliable slave.