First cousins, third cousins, cousins by marriage? I don't see any real problem with it as long as you are using protection. As mentioned above, the main concern with issues like this is reproductive abnormalities by having sex with a close relative. As long as you are having fun, and not hurting anyone, then go for it. That makes me think of a cousin of mine. He is a hottie and so is his wife. AND, we are only cousins by marriage, not blood. Hmmm...LOL But they aren't in the lifestyle that I know of...... Oh well.....
