Yes, though not with enough fortitude.

"Fiona, I am engaged. You know this, I'm not one to break a commitment! That includes even entertaining your lewdness.", you declare. Fiona cringes at the slight of her past transgressions but coincidentally right as she finds some bottoms in her bag and turns around, she coincidentally catches you adjusting your dick as you are saying this. Unbeknownst to you, you continue, "Please let me drive and I'll drop..." She turns sternly interrupting you, "Says the guy touching his dick as he peeks at a girl changing in his car! I remember a guy whom on his birthday a few years ago who 'entertained this lewdness' so much he licked and kissed almost every square inch of me gleefully."

Your face flushes as you remember your birthday while you were dating. It started as Fiona's gift to let you roleplay a dominant side with her at her place after a night out. When it started to fizzle out because it was so awkward, she dominated you like you had never been before. Fiona knew you were taken aback as you were beet red, driving slow, and your hand was unconsciously playing with the tip of your dick. She continued more playfully, "What was you favorite part of that buffet? The fact that my nipples were the hardest they have ever been with you worshiping my tits. The way I squirted all over your face while you were eating me causing you to cum that first time without stimulation. Or maybe the part where I pointed my ass in the air and you devoured it like the cure for all problems was in there."

You were breathing heavy while concentrating on the road. You removed your hand from you pre-cum leaking cock know if you would continued you'd be betraying Sarah. Fiona noticed your conflict and stated, "Listen, I know your fiancee, Sarah wouldn't like you reenacting those things on me. Hell Sugah, maybe you should go relive those with her." You state pathetically, " Fiona please stop this. You've already broke me before, I want to be with Sarah..." As you fade off, Fiona reaches over and grabs your dick and says, "All I want is to get off, so if you could describe your favorite part of that night in detail for the next ten minutes until we are at the shop, I'll do just that and go on my happy way. If not, we can do this the messy way." With that she gives you another quick squeeze before spreading her legs and starting to pleasure herself in such a carefree way.