I have had one or two experiences regarding your particular Fantasy (Voyeur) Mine are different, set up to suit my fantasy, but you may draw some ideas from my experiences. I met with a mature couple in their 60s, The Lady was straight and the Husband was Bi-Curious. As for myself, I am a lover of mature women with a fuller figure and who are old school, you know, frilly blouse, a little cleavage and a tight skirt or dress. The Lady fitted the bill admirably, and the Husband was a normal looking chap. We got on well in the pub where we met and had chatted about our desires etc and decided to meet for drinks at their house, I am married and my wife, god bless her does not play.
On arrival I was greeted with a peck on the cheek from his wife, and a glass of wine from her husband. We sat and chatted for a while, we sort of laid the ground rules, the Lady finished her drink and got up saying she had to powder her nose, very old school that term. She was gone for quite a while, and as arranged her Husband began to flirt with me, I am Bi-Curious but have no experience of man/man role play. He got as far as fondling my cock, which I confess willingly rose to the occasion, before long we had both exposed each others cocks and were toying with each other, and as my first experience I enjoyed it.
The lady returned to the lounge having given us enough time to become horny as hell. She sat opposite and began to pose showing ample cleavage and a hint of stocking top. The Husband suggested to me that she was horny and would I like to seduce her. Oh yes. The Husband got a nice wank from me and watched me slowly seduce his sexy wife, which excited him immensly.
James