I knew that if I disturbed him he would be angry that I was so late.

If I took my clothes off before I went up then I could just slip into bed beside him and he would be none the wiser so, before I climbed the stairs, I removed my clothes as quietly as I could, piece by piece and placed them carefully over my arm, carrying my shoes..

Completely naked I climbed the stairs on tiptoe, not daring to breathe until I reached the top.

It was only then that I realised...

I was still on the bus!