The longer penis feels like it takes forever to slide into the dripping vagina, recently modified. There is no way you Melissa could have taken the whole thing without the changes you made. You are absolutely enjoying the sex (as she rides you harder than ever) but are even more amazed by the flashlight!
You can't go on changing Mel, so through your sex-muddled mind you decide to try something.
Taking her left hand in your right, you place it on the flashlight in your left hand and shine the light on her breasts. You both immediately get small headaches, which kill the mood a little bit - but you also both realize what the light did! Mel looks at you in shock and tears her hand away, grabbing her definitely D-size gazongas. She sits on your pelvis, neither of you thinking as much about sex - and besides that, the pain of the headache made you a little soft.
"A SEXY light?" still holding her breasts, she asks "Is this what you meant?"
You can't tell if she is angry or what, so you simply and dryly reply "yes." You point at your meeting crotches. "I used it a little down here, as well."
She looks at you sharply, and you make note that she isn't angry, yet...
"On both of us. It is the first thing I've done with it, I swear" You check yourself without thinking if you should tell her or not "Ah, except I tested it in the store and grew boobs."
You'd watched her face go from ameliorated to pined with laughter. She chuckled while sitting on your dick, making you both aroused again as her insides jostled from the diaphragm's motion. "You had boobs?"
Relieved to be past the anger part of her reaction, you smile sheepishly and nod. Mel leans down and kisses you, then gets back up and makes herself more serious. "So, what did you change on us?"
You purse your lips and signal for her to get off you, which she does (laboriously sliding off your penis) and you stand up. Mel sits on the bed, her feet together.
"I made some changes to myself before you came, and then I made your... feminine area... more sensitive. More feminine, really. This light has a blue and pink setting, then a brightness setting. The stronger the light the stronger the change." She picks up the flashlight to inspect it.
"What is this?" She says, pointing the light at the blank wall and pressing a button you hadn't noticed...