Ralph Cooper is your best friend. He prefers to be called Coop or Cooper.
He’s a lover of MILF’s. He keeps telling you he has no problem with you trying to bang his mom, in exchange for him being allowed to bang yours! He does however hate the idea of you dating his sister.
Ralph will cover for you in most situations – unless you neglect your friendship or otherwise piss him off. Pursuing his big sister Kimberley is an easy way to piss him off; assuming he finds out. Conversely, Ralph doesn’t seem to have a problem with you pursuing his mom (Cynthia).