Should I be nice?!?!

So I am at my friends house..  This is a friend I have known since I was 16 and I am also friends with his siblings, he has become my best friend since I moved to TX.  He listens to me complain about work, my famiily, and school.  He offers to help when he feels I need it, whether its money, or just a place to escape reality from... 

Anyway, he is at work getting ready to come home.  He drives a heavy duty tow truck ( tow truck for semi's) I arrived a few hours ago and his house is a absolute mess, his children have not done thier chores as well as they have made an absolute disaster out of his bedroom, the bathroom, and the living room.  The glorified babysitter (AKA baby momma) has done no housework either.  Now I would normally warn them when he is on his way home. But they totally pissed me off, so now I am not telling them to do anything.  I know that my friend is going to blow a gasket when he gets home. He will be tired, hungry, and well pissed when he walks in the door. 

OH the deliemma...  Wait its no deliemma, I am not saying a word...  When I leave to go pick him up they will get it... In the words of my daughter Kylea...  Bawwhahaha....