What happens if...

There's a first time for everything

Ginny's Pov:
"Ginny, can we lay here all day?" Luna asked me.
"I would love to! But... I promised Ron I would help him with something, he wouldn't tell me what it was." I explained upset that I couldn't stay.
"I guess we can just make the most of our time here then." Luna sighed.
"You know, there's a perfect way to do that. If your ok with it though?" I asked her.
"Ok with what?" She asked me.
"Well usually people know what others are talking about..." I explained hoping she would catch on.
"I still don't get it." She told me. I sighed.
"Ok, do you want to have sex?" I asked her.
"Ginevra!" She yelled at me.
"Thought I'd ask." I explained and laughed.
"You know what, sure, but I have no clue what to do." She told me. We both Laughed at that.
"Wing it, I know what to do." I whispered in her ear.
A BIT LATER!
We were laying in her bed, her head on my chest she was asleep. We both only had a bra and underwear on. My hand was going through her hair as she was asleep. We were laying in my bed. Then Ron walked in, the blanket was covering us but... it's my brother!
"gin... I... ok..." he said and walked out of the room and closed the door.
"Ginny, you were supposed to meet me in the common room half an hour ago." He hissed to me.
"Oops! I'll be out soon!" I yelled back to him. 
"Yeah sure." He hissed and I heard him walk away. I picked up Luna's head and put it on my pillow, I got up, and got dressed. Then I wrote a note. "Hey Luna, sorry I had to leave, I was half an hour late to meeting up with Ron. Just stay here for a bit, I'll be back soon! Lots of love, Ginny." I wrote, put it on her clothes, then ran out of the room and met up with Ron in the common room.
Word count: 348