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!