Your body is always yours to do with whatever you please.
However it must be remembered that the underlying principle of monogamy is neither you or your mate will have sex with others (because you have taken a vow to fulfill each other's needs in that arena). One of the top reasons given for cheating is a spouse will not have sex with their mate for prolonged periods. Marriage is tough enough without using sex as a "reward/punishment" tool to control your partner.
Personally I don't believe you can go from trying to destroy one another to becoming passionate lovers (within 10 minutes). Awhile back I wrote a hub about this. Many people buy into the immediate "make up sex" being a great thing.
I on the other hand believe it may take up to a couple of days to put a "fight" behind me. I think it's important to feel the fight/argument has been resolved before you can make up. It also doesn't hurt to go through more of a "seduction" process as oppose to whatever your normal approach would be. Making up usually involves both parties apologizing for how they exploded or communicated their thoughts. It doesn't mean you have agree that one person was right and the other was wrong about the subject. You just want to agree that it was wrong the way you treated each other.