Thomas, who was actually the original Ian, got home from class that day feeling tired and worn out. It had not been a good day.
He closed the door and headed into the living room to find that Sarah was reclined on the couch wearing a little bit of lace and not much else.
Sarah was also sitting on the floor, wearing nothing but a dog collar and a smile.
He stopped and leaned against the door, a lecherous smile on his face. "Well, something seems different about you two, but I can't put my finger on it."
"It's my turn to be Honey," said the Sarah with the collar, "But I wanted a bit more sack time with you."
"And I thought," said the other Sarah, "Why not a threesome? It's not like you're cheating, since we're both your wife."
Thomas smiled and started kissing the Sarah on the couch when the one with the collar started licking him on the penis. They experimented with different positions for a few hours, but not before he'd blown his load into both women. They collapsed, exhausted, into the bed and fell asleep.
He woke with dog-Sarah licking him on the penis again. It wasn't long before the sex party picked up again. Since it was a long weekend for all of them, they decided to stay this way for the rest of it.