Both

I knew she needed my help but I think I needed a little excitement to hold my interest. I took a step behind her leaning into her nude form and looking over shoulder.

“Is honesty still okay?” She asked.

I expected her to say I was making her uncomfortable by pressing up against her.

“Nothing has changed. I always want you to be honest with me.”

“I’m really jealous of you. You’re so smart and you look so refined in your perfect outfits. I miss clothes so much. I miss feeling like a normal person.”

She let a tear drop and I felt that same grip on my heart as before. Damn, guilt was starting to come back as I wrapped my hands around her and clasped them just above her pubic mound. She mewled for a moment. I had to play this just right if I wanted her to feel comforted even as I took an advantage of her.

“That’s why I’m holding you like this. Feel my clothes against you and pretend you’re wearing them. I know you don’t like being naked but it’s just me. I want you to feel completely comfortable being naked in front of me. That’ll show some real progress that I can pass onto mom. There’s probably months of this left and it’s just me, your twin. Just act the same way you would as if you wore clothes. I hope it makes you a little more confident as you feel mine against your nude body.”

She paused and considered what I was saying.

“You’re really not judging me? You don’t think I’m a freak or a loser? That I’m less than everyone else?” She asked holding back another sob.

“No, you’re a wonderful sister, the person I love most, amazing and beautiful just the way you are, clothes or not.”

I put my chin on her shoulder and looked at her work. My wet crotch rested against her nude bruised bottom not that she could tell. She started to breath like she was building herself up to saying something so I interrupted before she could.

“Let’s take a look at these problems.”

She fidgeted for a moment as I lifted my arm from above her mound and took her hand with the pencil. It was easy so I just dragged her hand over while grazing her belly and showed her what she was doing wrong by breaking down the exponent where she had multiplied incorrectly.

She swallowed nervously but said “Thank you.”

I let her take the pencil back as I let my hands hang lower spreading them on her thighs right next to her slit. I felt a bit of her wetness and she took a deep sigh likely out of shame.

She must not have felt like she could protest because she tried to continue her work. She looked at her problems and did the second one using what I showed her and she figured it out on her own.

“Great job”. I said as I rubbed her thighs and she released a hurried breath.

“Um...” she was trying to speak and struggling.

“What, Lucy?” I asked likely knowing her problem.

“Why are you... um... touching me like that?”

I released her and backed up a bit.

“I was just trying to let you feel my clothes since you miss them so much.”

She turned to face me and I took in her full frontal nudity. I think she was trying to read my eyes. Her nipples had apparently hardened from my caresses and I knew she was back to being turned on.

“Thank you. It’s just...”

I nodded trying to prod her into continuing.

“... my mind must be screwed up. I can’t help it...”

She once again was blaming herself instead of me and it made feel even more turned on. My discipline and punishments had stripped her of the ability to self-advocate it seemed or think that I could be in the wrong. However I wanted to appear supportive so I put my hands on her bare sides and pressed my head into hers. She looked down at herself as she tried to think of how to say what I already knew she was going to.

When I was fed up with seeing her struggle I decided to step in.

“You’re still turned on from before?”

She wouldn’t meet my eyes as she nodded back.

“I’m sorry... Please, don’t tell mom. Please. I'm really not like this.”

I wasn’t sure if I wanted her to feel ashamed of her sexual feelings or encourage them, they both could be fun but for different reasons. However her vulnerability was making me second guess myself. Maybe I should just apologize and let her know it wasn’t her fault.