Well there would be multiple things. Too start though just her being the sexually open minded wife willing to experiment and explore new things. Having said that, I had a fantasy of her taking a monster (porn star level) cock. She agreed and we were lucky to find a guy with a nearly ten inch cock and super thick. First time we met him she sucked him off (twice) eager attempting to deep through before swallowing both loads. Second meeting, she gradually worked the huge cock in to her pussy riding him until he came deep in her pussy. Coincidently she did this twice in the same meeting which was hot since after the first session she was very ready for him and grinded away on his cock. The other time was after meeting with what was supposed to be a NSA meet as we were saying our goodbye's in the parking lot while we stood behind our car chatting she took out this guys cock and sucked him of. Honorable mentions, we set up a gloryhole at a high-end resort and she sucked off three guys that night, and anal sex with a young stud.