His sister and friends

Arnold gasped as he saw Veronica along with her friends staring at him in the doorway as he had his hand on his penis. He gasped as he ducked under the water and shrieked. “Ronnie!” He cried. “What are you doing?”

“Oh… sorry little bro,” Veronica said with a laugh as her friends all snickered. “I was showing Melanie where the bathroom was. Didn’t know you were in here.”

Arnold blushed as he saw the hot girls who were laughing at his embarrassing predicament. “Looks like we caught Arnie during his private time,” Melanie laughed. “Sorry about that, little guy.”

Veronica laughed at Melanie’s comment and said. “What were you doing anyways? Were you being a naughty boy?”

“None of your business,” Arnold said.

Veronica smirked. “Oh so I shouldn’t tell mom to come up here and see for herself?”

“S-she’s home?” Arnold gulped.

“Everyone is,” Veronica said. “So… what were you doing with your penis?”

Arnold squirmed. “I-I was… rubbing it.”

“I already got that much,” Veronica said. “But what were you masturbating to?”

Arnold gulped.