Cat sitting

I am cat sitting two cats Tippy and Ebony for a co worker of mine this weekend. I hope that Smokey and Arwen don't think that I am cheating on them! I have not seen the cats for a few months but when in went in to feed and spend some quality time with them that they were very friendly. I was a bit surprised because Ebony is usually shy and runs and hides if a stranger comes around. This time she did not come right up to me but did not hide. Tippy came right up to the door as usual. By the time I was leaving Ebony had come around an allowed me to pet her. I don't know but perhaps they sense my two kittens and believe that I am a 'good guy' who can be trusted.