Use your tits

You remember how good it felt when he was rubbing your tits earlier and how he seemed to like playing with them. With a smile, you guide his rod into the valley between your breasts, letting out a soft sigh of pleasure when you feel his warm skin settling in between them. You gather some saliva in your mouth and let it dribble on his cock, making sure to give enough lube for what's to come.

Once you deemed it sufficient, you close your mouth and cup your breasts with both hands, pressing them around his cock. His low moan becomes louder when you start to move them up and down his shaft slowly. First, both at the same time, using your hands to dictate the pace and keep a good grip on his penis. Then moving the left one up while moving the right one down before going back to move them in the same direction.

Judging from his moans, the frequent change of pace and moves is working on him, you feel his hand threading through your hair, whispering encouragement and soft words "Hmmmmm...it feels amazing miss.....please, keep aaahh....going". You keep drooling during the act, making sure your valley stays wet enough for it to be pleasant until he starts leaking enough precum to replace your saliva.

You occasionally glance up at him, peeking at his face, flushed from exertion and pleasure. Under his domino mask, you can see his blue eyes clouding a bit from the lust he must be feeling. When he sees you glance at him, you feel him becoming even harder, if possible. He even starts to hump against you, combining the moves of your breasts with his hips to rub even more in your bosom.

You feel it won't be long before he reaches the edge.