My next discovery

The next night after my extremely busy day at work, I arrived home got the children from the babysitters and Chrystene from my husband's parents.  My husband had left for work so that left just me to get supper, get homework done and get my other daughter to gymnastics class.  Chrystene told me she had to use the bathroom, I took her in to the room and discovered she is wearing a diaper.  Mind you this is a four year old child, I was in complete disbelief.  Where was I at?  What had I missed in the time that we were dating?  I took Chrystene to the toilet and she proceeded to throw her super tantrum.  I could not believe this I grabbed my cell phone to try to call my husband and of course was unable to get through.  Chrystene was afraid of the toilet, I could not believe that he had hidden this from me.  How did I miss this?  Every time I had her before I knew I didn't see a diaper.  We made a game of flushing Cheerios down the toilet, she squealed with delight every time that they went around in the bowl, but still refused to use the toilet.  I was changing a four year old child's diaper.  I was furious, who had done this to this child?  How could they get away with this and why was she so afraid of the toilet?