Just Two Siblings

I'm a male renamon called Miles, I share a house with my sister Melissa. I'm a bit of a femboy, since I have wide hips, fat ass and I like being penetrated. My sister's not spared either, because despite being only 25 years old (I was 23), she has the body of a MILF. Plus, she's a futanari, or girl with a penis. I didn't know if she was big or not, since I hadn't seen her naked since she was 10 or so, when we stopped bathing together.

It was a day like any other, I woke up early, and I went to take a shower, not if I first took a dildo and stuck it to the shower wall. My canine cock was getting hard from just thinking about what I was about to do. I stuck the dildo to the shower wall, turned on the water and slowly pressed my butt against the tip of the dildo. I started moaning as the tip went in, I had to stop and start again, since my ass was still very tight. When it was halfway in, I started pushing and pulling, going a little further every time, until the whole thing was inside. When I got used to the size, I started to go faster and faster, the feeling was great. I was afraid Melissa would hear my moans, but, I mean, she moaned too when she took showers, I knew she'd probably understand.

I started to go faster, and the pleasure was great, but then, suddenly, my sister entered the bathroom, naked. I started slowing down, looking at her in shock.

"M-Melissa!? W-what the fuck are you doing here!?"

"Oh, I'm sorry. I thought you were done showering." She said with a smug smile.

"Well, I'm not, so leave now, please."

She ignored me, and instead, approached me.

"M-Mel? W-what are you-" I asked, but she interrupted me with a kiss, and I immediately pushed her away. "Hey! What the fuck is wrong with you!? Are you drunk!?"

"Do I smell like alcohol, hm?" She said, her breath on my face.

"G-get out, wait for your turn." I insisted, but she wouldn't leave.

"Bro, how do I tell you this... I kinda like seeing you like this, ya know? You're a bit of a femboy, you like being penetrated, and you have a big butt, and you know it." She said, squishing my buttocks.

"Ah!" I yelled and fiercely pushed her away. "Stop! What do you think you're doing!? I'm not into incest, Mel!"

"And how do you know if you never tried it?"

"That's not the point!"

"Are you sure you don't like... How do you call me around your friends... A MILF like me?" She teased me, and I didn't even answer. I couldn't believe she heard me talking dirty about her with my friends. "What, cat got your tongue?"

"Mel, if you don't get out, I swear-"

"Or what?" She said, her eyes looking straight into mine.

"M-Mel, g-get out." I tried to be serious, but she kept advancing towards me.

"Or what? Are you gonna make me?"

"D-don't get any closer!" I insisted, trying to sound threatening, but even I knew I didn't.

"Come on, what are you gonna do about this?" She asked, her lips inches away from mine.

I couldn't answer, a part of me really wanted to let her take control, and I hated that side of me, and another part wanted her to stop. I could feel my cheeks heating up and my legs shaking.

"M-Mel, s-stop, y-you're scaring me..."

"Do you really want me to stop?" She asked. "Look at me in the eyes and tell me you don't want this."

I couldn't tell her, not even lie, and she knew that. I didn't look at her, I couldn't.

"That's what I thought." She whispered, and her lips finally touched mine, and the kiss was passionate, intense, and it made my cock grow.