How can I ask him?

Im a girl of 19 and I wonder how to get a favor from my brother who won a kickboxing game last night against my other brother. I actually need a nice foot and leg mage from him as I was cheering for him all the way from the start to the end of the match. Im now sitting on the couch with my feet on top of the couch wondering whether to ask him to do me that favor...and the guy is right in front of me watching TV...but the only problem is sometimes the other brother who lost the game might become jealous!!! I think once he leaves the living room I we can both talk about it!!! Shall I ask him to do it for me?