Sister sleepover

Crashing into bed, I groan happily, rubbing my cum filled belly, ready to sleep when I heard a knock on the door. Turning my head, I see May standing in the doorway. "What's up, squirt?" I say as I sit up.

"Hey, sis, can I sleep with you tonight?" May rubs her arm.

I smirk and wave her over, glad that even after all these years, my little sister wanted to hang out with me. "Sure, come on, my bed is a bit small so we can't move around much."

May looks like she gulped, maybe nervous about something, but came to me anyway. Gingerly, she sat next to me and I pulled the covers over us.

"Any reason you want to sleep with your sister?" I whisper, hugging May into me.

My sister seemed to jerk at that.

"Is something wrong?" I ask, frowning at the small girl.

Wiggling about, May bit her lower lip in a cute way, saying nothing.

"Come on, you can tell me anything," I say, hugging her almost motherly. "I'm here for you, if you need anything, I'll help you."

My sister opens her mouth for a moment, then closes it; after a few seconds, she puts on the monacle and looks at me.

"Why all the hesitation?" I ask, trying not to frown too much. "Do you need something?"

"Can I..." May begins, blushes and wiggles some more. "Can I fuck your pussy, please?"

"Sure you can," I say as I turn around, pulling my panties down from my legs, brushing my backside against May. "What kind of big sister would I be if I didn't let my sister relieve herself some pent up cum churning in those balls of yours?"

I couldn't see the expression on my sister's face, but the small questing hands pulling my leg open made my heart flutter with joy at how good a sister I was as I felt the head of May's cock part my vulva. As she pushed deeper, I sigh at the pleasurable thickness pushing further.

"You feel so good..." May grunted as she pushed more.

"I would hope so, it is for you to use as much as you need," I say huffing slightly, the years of letting May fuck me moulded my pussy to her, so of course it felt good for her as much as it did for me, how could she not remember that? It actually kind of hurt. "Didn't you boast to your friends that I was your fleshlight once?"

"Did I...?" May asked, probably not really aware of what you were saying.

"And what about all those times you called me onahole instead of my actual name when a friend was over?"

"I'm sorry."

Hearing the breathy appology melted my annoyance away, I could never be mad at May, never. "It's okay, just keep having your fun."

After saying that, I heard May grunt as she thrusted harder and faster, she must really be pent up. Then I felt her head push against my back. "I love you!"

"May?" I blink in shock, not once had I heard my sister sound so sincere, that it made my heart thump. "What do you mean?"

"I love you so much!" May shouted once more, somehow moving even faster than before. "IloveyouIloveyouIloveyou..."

Heat rose in my face as a strange bliss flowed through my mind, morphing the feeling of pleasure May's cock made in me.

"I'm cumming!"

For a moment I panic, when May was always close to shooting her load, she would always pull out and stick it in my mouth, but this time, my sister made no move to pull out. "Wait, what are you doing, you can't cum in me!"

But it was too late, May jerked to a halt, hugging me tightly as she shot a load in my womb. Then after a few seconds, she went on to fuck my creampied pussy a second time. I moaned as May continued to rail me, shooting a third load, then a fourth, a fifth, and so on until she finally tuckered herself out at number twelve, my belly bloated out further.

Finding it hard to move, I just lay there, my sister's half-hard cock plugging up my pussy. Not wanting to wake May, I turn around with her cock still inside me, and hug her tight. "You are so silly, May..."