That is only true if your prefer to ignore history and traditional relationships and in this case if married women with children seducing children is just fine.
I don’t think men & women are the same except for the application of different genitals and I don’t think the age difference is equivalent if the guy is older or the woman is older. That part’s my opinion the statutory rape part and seduction of a person you are in authority too is not.
I don’t think she slept with him when he was 15. Do you have evidence that she did?