Husbands friend has a kink!

So one of my husbands friends i play with has abit of a kink. he thinks i look abit like his sister. been playing with him a few months now and it makes him so hard to think of me as her when he plays and fucks. he has even moaned her name a few times.. at first i wasnt too sure but it kinda makes me feel really hot cause he fucks so good lol