Give her warning

You hold Amy's head down on your cock as she cups your tensing balls in one of her hands. Her other still grabbing her tits and pinching herself.

"I'm going to cum!" You exclaim before letting Amy's head go. She pulls back and strokes you furiously. She gasps, her face wet with tears from throating your cock. Her full tits sandwich the green apron covered in spit and drool.

"Cum all over me, Daddy!" Amy purrs as she looks up at you. She takes your head back into her mouth to push you over the edge. You grunt as you struggle to hold your orgasm back to enjoy every hot, wet, stroke in her mouth. Finally you can't hold on any longer. You moan loudly as you unload all over Amy's tits and apron. She strokes you as she purrs, "Yes, Daddy, cover my big tits with your cum. I'm your sloppy little throat slut."

Your cock shoots multiple heavy ropes of cum. When you can finally focus your eyes again, Amy looks up at you with a big, flush-faced grin. Her apron and tits covered in your white, sticky cum. "Thank you, Daddy" Amy says, giving you a wink before she stands up. She pulls her apron out so she can see your handywork.

"Well, that is quite the mess. I think I better wash this before my next shift with you." Amy giggles as she fingers the cum and drool mixed mess on her apron. See looks back at you. You can head home now, you've been a great help today...Daddy..."

"Amy.. that was..."

"The best blowjob you've ever had? I get that a lot." Amy smirks "Just think about where I will let this cum end up after your cutmitzvah."

You pull up your pants and leave Amy to clean herself up head home herself. You head home, your mind racing with the possibilities that Amy implied. If you weren't motivated to get cut already, this sure helped.