Is he Bluffing?

A married guy i used to sleep with ( BEFORE he was married!!) has been tring to get in my pants for 6 months. he went so far as to call in the midle of the night and ask me to come to his house he lives @ with his wife becuase she had left town for the night. of course, i said no. he sent me graphic emails nad talked about wanting . i wrote him a week ago said i was horny too and wanted him too, and he wrote back saying his manhood was hard. well two days later, he writes an emali about how he just cant go through with it becuase he hates his wife but woudln't do that to his son. is he bluffing playing that whole " hornorable guy " thing but he really wants to get down & dirty and have me pursue him so he doesnt feel guiltly? or does it genuinley sound liek someone like him could be pursuing it that long then change his mind?