Did Sidious actually cared for Anakin?
Although I will not doubt that he lied to Anakin to help him turn to the Dark Side, I really do think that he enjoyed him as a friend.
In ROTJ, he often referred to Vader as his friend, but more importantly, at the end of ROTS, with Anakin laying all burned up, he comes to his side and puts his hand on his head as if to say, "I'm hear now and will care for you."