Slow

"I-I don't want rough..." - seeing that he have just these two choices Eric decideed to choose the one that could be less painful.

"Thought so... Anyway let's see what I'm dealing with!" - the demoness pulled down boy's pants and grabbed his butt. - "Hmm, you do have a nice ass and body, but I think I can make them better!"

Suddenly Lily pushed her fingers into his flesh and Eric felt as something flowing into him, it wasn't outright painful, but pretty uncomfortable as his body was changed by Lily's demonic magic: his hips and butt became bigger and fatter and his thighs also thickens while his shoulders and waist narrowed a little, his skin become smoother and softer and his face structure changed becoming more androgynous if not downright feminine. Couple minutes later Lily grinned looking at her work.

"Now, that's a real butt!" - said demoness as she squeezed and groped Eric's fat buttcheeks. - "I'm much better at flesh sculpting than at illusions so I hope you'll love my work! But now, Let's get to business!"

Lily spread Eric's buttcheeks and placed her large cock in fron of his hole. She already was leaking pre, and after couple moments of lubing him she began pushing in. Eric tried to clench as hard as possible, though some part of him do enjoyied the sensations, but the demoness was stronger so with a grunt she pushed first couple inches inside.

"Aah~ Yeah, you're tight, though not for long..." - moaned Lily as she continue pushing her thick member inside with bucks of her hips, pulling a bit out and then shoving back deeper. Couple minutes later Eric's butt comes in contact with Lily's hips, meaning her whole dick was inside his ass. Suddenly the boy felt as the succubus wrap her hand around his already hard cock. - "Oh, I see someone enjoys having his butt stuffed with large girl's cock, aren't we?"

"N-no, i-it's just..."

"Fufu~ Don't worry it's completely natural position for you, there's nothing to be ashemed of..." - whispered Lily in his ear, she put away her hand from his dick and gripped his slim waist. - "...and now I'll make you cum without touching your tiny dick."

Suddenly Lily slammed her hips into Eric's behind making his large cheeks jiggle and pushing her member deep into his insides extracing loud feminine moans from Eric. To his surprise he came after couple minutes of intense buttfucking, demoness barely acknowledged her partner's orgasm and picked up pace.

"Get ready... I'm... I'm cumming!" - Lily slammed her hips into his plush ass and Eric felt as his insides were flooded with Lily's jizz, triggering his orgasm once more. His middle swelled as she stuffed him and her softened dick blocked the way.

"Ugh, f-fuck... l-let me go..."

"But why? I see you do enjoyed this, beside that was just a warming up..." - said Lily as she start gyrating her hips while her cock began hardening in his ass.