Rapper Kevin Gates -- I Was Banging My Cousin for 2 YEARS!

Rapper Kevin Gates was having sex with a woman for nearly 2 years after finding out she was his cousin, and he tells us he'd do it again because there's nothing wrong with it.

Kevin just went on TMZ Live to clarify what he posted a few days back ... that he was dating a woman a few years ago and after 3 months his grandma told him the lady was his cousin.

Kevin told us ... they began dating in 2006 and continued dating for nearly 2 years after finding out. He says he never found out whether it was a first, second, third cousin or even more remote.

The rapper and the woman are still close, and he has no regrets and feels no weirdness about their relationship.