eaten my own creampie

You got to get her very HOTT and have the guy right there, readily available to do the deed BEFORE she's had a chance to cool off.
An arrangement I once made was to go to a hotel for a weekend with my wife. I had met a potential bull earlier and made arrnagements for him to show up at the hotel. When I had her a little takes, feeling good and very horny he called me on the cell phone and I gave him instructions to the room. His timing was excellent as I had her masturbating herself with a Dildo at the time, and pretending it was a stranger. When he knocked on the door I told her, "Honey I have a nice surprise for you".
She instictively covered herself up with a sheet, but I removed the covers and there she was looking sexy with the dildo inside of her. Their introduction to each other was short as he was out of his clothes in no time, and his pole was ready and willing! It wasn't long before he was licking her clit with the dildo still inside her and then he took out the dildo and entered her, humping hr good for a loooong time. He was about 7 inches. She came like a horse that night. After a cigarrette and another take, I started eating her and she became hot again. He then mounted her again and I managed to stick my dick in her mouth while he was pumping her fast and furiously and I thought she'd go crazy with lust. Later she confessed: "I could just ******* you for setting me up like this...but I loved it...thank you, honey"! Might be a method that might work for you.