A Double Infusion (First Time Swingers) by Eloise Harper

Tina and Nick have been looking forward to spending some quality time with their pals, Cathy and Jerry. Tina is especially excited to share news of some mutual friend's foray into a spot of wife swapping. But what Tina doesn't realise, is that Cathy and Jerry were the other couple involved. When they guess the truth, Jerry's response is to offer to introduce them to the lifestyle too. Nick outright says yes. Tina is a little more reluctant, but ultimately she's unable to resist the handsome Jerry. She doesn’t quite get what she thought was coming her way though. She expects a straight swap. And that's how it starts, but in the end, Tina is expected to satisfy both men at the same time, and that sure means it's going to be tight down there.