I don't think you can beat seeing your wife with at least 2 men! Her in the middle as they play with her tits and pussy and kiss her as she strokes both their cocks!
The part where they are all sat on the settee stroking each other is so hot, i have seen my wife with two men on our settee many times, and watching my wife stroking their cocks as they feel her tits and cunt is the most cock stiffening sight ever to me.