What does your boss working from home have to do with you working from home/sleeping in? It seems to me that it should have zero impact.
small office so weird rules- we always work from home on Fridays but we will also randomly do it if other people are going to be out.
Guess I don't understand why you are so upset. I also work where coming in can be optional so long as you get your work done. You were already heading into work and your boss called out. So what? Do your work and take pride in it. Like the previous comment, I don't see how it should effect you since you were planning on being there anyway.
The rest... meh. It's not like anything negative happened specifically to you.
EDIT; Seems OP was using sarcasm. Must of had my sarcasm detector turned too far down.