Mark growled a little as he could no longer keep his hands off of Aiden. He grabbed Aiden's waist and easily lifted him up onto the bathroom countertop. Aiden gasped a little. The countertop was cold under his new, plump bottom. The chill gave him a little shiver and he felt his bigger nipples harden and get even more erect, if such a thing was possible. They looked like bullets at this point.
Mark's mouth was on top of his, his tongue forced its way past his lips. His hands quickly moved up to Aiden's tits, massaging them and feeling their new weight. Aiden hadn't even gotten used to having them, but they sure felt good and he moaned in response. Mark stopped kissing, turning his attention to Aiden's new boobs. He smiled and began sucking on Aiden's big, sensitive nipples. Aiden could feel Mark's mouth clamp on, sucking hard. Mark's bushy moustache and beard was tickling his breast. Aiden was overcome with feelings of pleasure. He moaned louder. Mark paused and switched from one nipple to the other, asking "Oh, you like that, don't you, pussyboy?" in between.
Aiden couldn't even answer, only moan, as Mark's mouth clamped onto his left nipple and began sucking hard. Mark's left hand was squeezing and fondling Aiden's other tit, and Mark's right hand was fingering his wet pussy.
"Uhnnnnn...Daddy....fuck me!" Aiden blurted out. "Gladly," Mark answered, grabbing Aiden by the waist again and throwing him over his broad, hairy shoulder. With his other hand, Mark groped Aiden's bubble butt. He bounded over to the bed, and as he did so, he was aware that his newly-modified round, hairy pecs flounced a bit as he walked. Their weight felt pleasant. Then he laid his boy down gently, then he climbed on top of Aiden and began running his tongue up the inside of Aiden's thighs.
Aiden took everything in. He felt the weight of Mark's big, hairy body on top of him. He enjoyed all the feelings of Mark working his way up and down his body, from his pussy up to his breasts. Mark's thick member was throbbing in anticipation. Drops of clear precum were oozing from its tip. Then, as Mark moved to enter him, Aiden slipped out from Mark's grasp. Mark collapsed onto his back and Aiden switched things up, straddling his partner.
Mark's big, veiny cock was bobbing up and down, and Aiden lowered himself down onto it. He felt Mark's dick slide all the way up inside of him. It felt amazing! He went all the way down to Mark's bush, letting his pussy get filled completely.
"Oh yeah...you feel so good inside. Your pussy feels so good, baby," Mark said, and he began thrusting slowly, "Does that feel good, do you like Daddy's cock inside you?" Aiden moaned louder, "Yes, you're so big, Daddy!" He moved his body in rhyhtm with Mark's thrusts, harder and faster.
As Aiden rode him, Mark teased and pulled at his own perky, sensitive nipples. Mark looked up at what he had created. Aiden still looked somewhat masculine. His body was lean and muscled, with a man's handsome face, even some scruffy stubble. But on his partner's chest, new tits bounced up and down dramatically with each movement. It was great!
They switched positions several times during their lovemaking. Mark enjoyed being on top and bringing pleasure to Aiden with each powerful thrust. Finally, they both came amid grunts and moans, collapsing back into the sheets.