Sounds like you kind of got what you deserved... Fucking another mans wife is immediate grounds for an ass beating. It is what you get for fucking with another persons life. There is a price for everything you do in life, so just man up to it and move on.
You are lucky this is all you got and will hopefully teach you a lesson.
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"The towers are gone now, reduced to bloody rubble, along with all hopes for Peace in Our Time, in the United States or any other country. Make no mistake about it: We are At War now -- with somebody -- and we will stay At War with that mysterious Enemy for the rest of our lives." H.S.T. 09/12/01