Yes

You hesitated: "Can I know in advance what price I have to pay?"

Flowey laughed: "Don't worry. It won't danger your health."

You weren't able to think of any other way: "Ok, I accept."

She led your through a maze of dark tunnels. There were many sound echoed, not like any animal you ever knew.

After about half a hour, the two of you saw the light again. Now you're standing in a cave which was full of glowing crystals.

"We're safe here."

"Thank you."

"You don't need to thank me, it's just a deal. Now I'll take what I deserve."

Before you could say anything, a thorny vine appeared in Flowey's hand. lashed it like a whip. After a few move, all your clothes were torn apart. At the same time, you felt your whole body go numb and fell to the ground.

"What are you doing?"

Flowey didn't answer, but looked at your cock with craved eyes: "Your thing is so huge. I haven't ever seen any other penis as big as your."

Only after she said that, you noticed that your cock was the only part on your body that was still lively. Sadly, you weren't able to control it either: it drained blood from your body and slowly erected.

"Don't struggle, my resin is not only a paralyze poison, but also an aphrodisiac." She shouted in excitement: "Ohhh, it can still grow BIGGER! You make me wet." She began to touch herself and moaned.

You didn't know what she intend to do, but you had a bad feeling about this.