Recently I was offered?

a position at my apartment complex. I was interviewed by the owners and a over-see manager. I accepted the position going by what they told me. The problem arises that there is another woman that works there. I was told that she was going "out the door" because of bringing her children to the office.

Well I worked with her for a couple days and ended up being her personal babysitter while she showed apartments. She has done this on several occasions. The owner called me a few days later and asked me how things were going. I told her fine except for I didn't know I was being hired as a day-care provider. I do like this other woman, but it's not fair to me to sit and clean up vomit, garbage with dirty diapers, and watch her child. I have my own son to raise for God's sake. Anyway, the other woman is now only working 2 hours at night and I work during the day. She is furious and won't even speak to her friend that works at their main office. Why is it that I feel guilty for telling the truth and letting the owner know my feelings? Am I in the wrong? I was told that she was going to be let go eventually, but I still feel bad at the same time. Thanks for all who answer.