It's Peppermint Maid

The Peppermint Maid from earlier revealed herself, keeping her head down in shame as she walked in and closed the door behind her. “F-F-Forgive me, Master Finn,” the Maid said politely. Finn felt his already erect phallus twitch at being called “Master”. “I just came in to see if you were doing alright,”

“It’s no problem, Peppermint Maid. But, while you’re here, could you tell me why the tub is like this? It looks more like a jacuzzi than a bathtub,” Finn said.

The maid seemed to perk up a little. “Oh, that’s because it kind of is. My Princess loves to invent things, she built the tub to also double as a jacuzzi! There’s actually a nob near the soap dish that if you turn it will activate the jets.”

Finn looked where she said and saw a nob. Once he turned it, the jets activated and caused the soapy water to bubble up, promptly turning it into a bubble bath. “Woah! That’s awesome!” Finn said in amazement.

“I’ll be sure to tell my Princess that you like it,” Peppermint maid said happily. Before the candy woman could leave the room, Finn said something.

“Hold on, Peppermint Maid!” Finn said.

“Yes, Master Finn?” PM asked innocently. Finn felt his genitals twitch in arousal again.

“You don’t have any other tasks you need to take care of tonight, do you?” Finn asked.

The maid shook her head. “No sir, I was actually going to retire for the night after this.”

“Well, if it’s not too much trouble…I was wondering if you could help me with some…hard to reach areas,” Finn said nervously. He couldn’t tell you why he was suggesting that the maid join him, but for some reason he felt a strong primal craving, one that he felt the woman in question could help him satisfy.

The Candy Maids face became as red as her stripes. Her legs were shaking in anticipation. “Well…” PM said as she pushed her fingers together nervously. “Seeing as you are a guest of Princess Bubblegum, it is my duty to…serve you…” the maid grabbed a cloth and hesitantly squirted some soap onto it.