Shared genitals as a way of thanking a friend

Hot ass girl belong to a fraternity where in there three of them are real life friends.These real friends of her was a guy and the other is a girl which this two end up getting married.Three days before the marriage,they assigned hot ass girl to host the shower party for their wedding and a lot of effort was scene by her.As the couple talk about their last sex encounter before the marriage,they both decided that their hot ass friend will be the lucky one to join them in three some idea.And there it goes in the picture,blessing in each other genitals was shared.