Nick thought of his twin sister, he knew she was still in Europe and Tony had met her once. He had commented on how much Nick and Nancy looked like each other. And he did have some of her clothes he saved for her from when she last visited him. He remembered that Tony had seemed to like her a lot; he had told Nick later that he thought Nancy was a very hot chick and asked Nick if it was OK if he could try and date her. Nick had said 'Go for it' knowing his sister was leaving the next day, so Tony did not have a chance to ask her. But if Nick changed into Nancy, then Tony could ask 'her' out and maybe let Tony get 'lucky' and 'she' could experience that great sex with Tony again. Even better than at the club since this time 'she' would not be surprised and could really get into the act.
Just thinking about it was getting Nick hard. So he decided to call Tony and tell him that Nancy was coming for a visit but that he, Nick had to go out of town for awhile. That way he could let Nancy stay at his place and also ask Tony to 'take care of her' while he was away.