We don't have a routine - the encounter varies based on KK's mood, the situation, and the encounter partner/partners. Sometimes I watch and listen, sometimes I stroke my cock and cum while watching her. Other times I'm an active participant, from helping her fuck to fucking.
One of the rooms at our home is set up for sex - a playroom. When we're in that venue, there are various props/furnishings that are part of the scene. We have a two-way mirror in a rolling frame. When I'm in pure voyeur mode, I sit naked in a chair on the see-through side, while the reflective side is facing KK and her partner(s). I watch, stroking, edging, trying to time my ejaculation with her orgasm. I thoroughly enjoy that protracted kind of edging play, waiting for the moment of bliss, watching KK cum on her lover's hard cock.