OK that explaines a lot. Have a look at the link below and see if it sheds some light on the subject. My wife used to get sore the way you are discribing. Take a bit of time to read all the information in the link below and you will have a good understanding of what is happening and why. You will also find that a permanate solution is simple and will not only cure the problem with soreness but you will both find intercorse a lot more enjoyable. I know that it worked great for my wife and myself.