Yeah, my sim was seeing someone and she invited him over. She then proceeded to take his aquazip for a joyride instead of spending time with him. Well, now I know what she was really interested in! I had him call over to her so she got off it and he put it back in his inventory. It's as if NPCs and uplayed sims are treating everything like community property, food, aqua zips, homes. It's a bit too much.