Hello there, I might be able to help with this one as get asked a few times to do this. As I work from home, smoking isn't an issue except they have to come into the living room. Two hours is a long job for a smoking fetish so can only tell what I do.
I wear something sexy and enticing and invite them for a drink. While chatting, I smoke a first fag doing all the usual flirty things like playing with my hair or rubbing the tops of my stockings. Try and make it seductive looking...the smoking, and blow the smoke directly at him. Then I usually sit on the floor between his legs, remove his clothing and do some gentle teasing to make him hard. I get my boobs out and light up another fag and make sure my boobs are rubbing his cock and kiss him whilst smoking, sometimes blowing it into his mouth or in his face...depends what they like. Tease his cock some more with your fingers, have another fag and give a bj while smoking...they love that.
That's pretty much what I do and if had to do two hours, would just repeat it......then cough your guts up afterwards. Let me know how it goes.
Ps they love the smoking french curls and rings but I can't do those