A Girlfriend's Revenge

Laura is deeply in love with Derek, and they share a common interest in kinky sex. They had had sex in public and at other shocking things but the two were now wrestling with the idea of adding a third person into their bed. But should it be a man or a woman? Derek was all in on having a woman share their bed, but Laura balked and insisted it should be a man. After all, she would be just as turned on watching her boyfriend play with another guy as she would to see her doing something similar with one of her girlfriends.
They even agreed to do one gender first and the other gender second. All of this led to a stalemate. The two were firm in their decision, both wanting a threesome, but each wanted to pick the gender which they could agree upon. That is until Derek came up with an agreeable solution. They would merely flip a coin. Heads it's a girl, tales it's a boy. Much to her consternation, the coin flip turned up heads and Derek would get his 'girl-girl-boy' fantasy.
Laura showing good sportsmanship congratulated Derek and promised she would find them just the right girl for their menage a trois.