You do

Even though the position you two are in would feel a little awkward normally, right now, neither of you seem to mind much.

Hearing Allison moan underneath you as you thrust your hips against hers has your blood pumping, and the illusion that you're pounding her the way Fiona did has you so turned on that you can't think.

You're enjoying yourself more than you ever have even with your cock inside of her pussy, but as a drawback, you quickly approach your limit.

You briefly try to slow your hips, but a needy moan from Allison, coupled with her legs pulling you against her convince you to pick up the pace again.

Realizing you're going to cum any second no matter what you do, you lose the will to stop yourself, thrusting your groin against Allison's clit ever more intensely.

The way she shudders in obvious pleasure is gratifying, and ends up being the final straw that pushes you over the edge.

You feel Allison bury her head in your shoulder to keep her moans from getting any louder as you grind your bulge into her, your cum spurting out into your pants with every movement of your hips.

You feel like you're cumming for an eternity, and Allison's body seems to quiver more and more as it goes on, like she's reaching a climax of her own.

Unfortunately, the timing is off...as her climax builds up, your orgasm fades, and your cock begins softening slightly, growing overly sensitive as the refractory period sets in.

There's an animal-like heat in Allison's eyes as her legs squeeze onto your hips even more tightly, as if determined to make you keep going.