I caught a mouse...again!

I brought a mouse home for Mummy at 1am last night and she didnt seem too pleased? Don't know why. She chased me downstairs and then upstairs then downstairs and couldn't catch me...I ran out the catflap. I waited a while then when Mummy had gone back to bed I called her again to show her I still had the mouse. She seems very stroppy in the middle of the night...thought she would like to see what I had for her...humans can be so ungrateful!