I heard my neighbour having sex

Just something that happened last night.

I heard my neighbour having sex last night

It started slow and I thought I was just imagining it

But then it became more intense

I could hear her moans of pleasure

Then the sound of bodies clashing furiously

And of furniture shaking

Who ever thought that paying a small fortune for a tiny aparment with cardboard walls was a good idea?

After they were done, they spoke for a while

It was really late, so other than them speaking, everything else was really quiet

I could make out some of the words, if I paid enough attention

Then he decided to leave

I was laying in bed, being as quiet as I could possibly be

I didn't want her to know that I had heard them

Then the idea came to mind... if I could hear her, it meant that she c...

What did she ever hear me do?