Riding horse

As you may remember about 1 1/2 years ago I bought a rescue haflinger that had been in a wreck. We tried working with her several times and she never really made much progress. She always wanted to kick the tongue and got very nervous. About six weeks ago I went to get Chester (the horse my daughter started riding) and he had a bad hair day and would not cooperate for nothing. I went to get my other mare (Precious) and she wouldn’t come near me. Then Molly(the rescue horse) comes up to me. I figured what the heck, I’ll give her a try. I put the saddle and bridle on and started leading her around. She did not get nervous at all. To make a long story short, Emily(almost 10) has been riding her a few times a week and taking her to riding lessons and Molly is woking out very well. She very cautious and takes a lot of coaxing to go faster than a walk. The couple times she did spook(once my fault) Emily just talked to her and had her under control. All I can figure is she does not associate riding with driving. Emily can go out to the pasture, put her halter on, lead her to the trailer and load her. I hope things keep progressing as well as they have so far.