The name lets a lot to be desired but its: the gorny stepfather, is not the best history but a lot better that the ones that are out lately =S
you mean "the horny stepfather" by mancin/melkor? He has more. Just search for Melkor and have the "show expunged gallery" ticked. He's made others.
http://exhentai.org/g/407417/4575109a8c/
http://exhentai.org/g/428609/357010f3ac/
http://exhentai.org/g/722145/bd7714db07/ (this is a work in-progress)
and maybe this one http://exhentai.org/g/674257/5b09a0b9a7/