aight 1stly, u knew exactly wot was happenin but ur jus coming on here 2 seek re-assurance and some evidence that what you did wasn't entirely wrong. as far as im concerned, sitting on his lap is too far. him feeling u up, now that another story alone. i don't think he "tricked" you or led you into it, i think it more of the other way around. YOU sat on his lap, making yourself available already! then YOU enticed him. I think you like this guy n ur jus tryin to deny it to save yourself the shame now.
to say the truth, if it was me, i'd break up with you. bashing the other bloke wuldn really solve anything.....although it'd make me fell a lot better but yeh, i think u knew exactly what was going on.