I feel sorry for her…but, Okay, so she’s attracted to her priest. That’s what is is, attraction. She can be sure that there will be quite a number of women throughout his priestly life who have or will feel attracted to the priest.
Of course a good priest who is living his ministry (which makes him particularly appealing!) and also who has some attractive personal characteristics will have a following of women throughout his life, who are drawn by these things.
Of course he will seem more attractive than the husband she lives with in her husband’s faults and foibles and in the often tedious aspects of marital relationship.
This woman does need a good dose of realism…and to know that if she finds him attractive and thinks she is what books, movies, poems, magazines have taught us that we are in love with someone when actually there is imagination, chemical attraction, maybe in some cases boredom and disappointment in operation also, and so we want someone other than our husband or someone else’s husband, or a priest or whoever because he seems what we don’t have and want.
She also needs the blast of reality will only be one of many throughout his lifetime who will be attracted to him at some time and even believe themselves in love with him" and if the poor man is lucky they will keep it to themselves rather than put it into the poor man’s mind and emotion so he too may slip into private sin if nothing else, and be made uncomfortable around the parish he is called to serve.
Whiile she continues to allow space in her mind for this, she cannot be fully committed to her marriage vows and her husband, and he will by contrast become less and less attractive and this will communicate to him and may even damage their relationship.
Being the so-called "in love’ (translate to attraction and admiration, it isn’t love) Love is everyday acts of practical kindness to the people in our lives, whether it is easy or not.
I speak thus because not everyone sees through the charming veils that these things are often obscured by. Jesus speaks not one word about ‘in-love-ness’ except to say that to look at another with lust in your heart is to commit adultery. Jesus only speaks of practical and even of sacrificial love and this is what the commandments and the Gospel and Christian life, created human life is all about.
I’m sorry to be so blunt but I’ve seen this sort of thing where people get tied in knots over priests, and the effects in their lives and others even if they 'do and say nothing the harm is great…and pointless. I know people can be offended by this as they feel their ‘in-love-ness’ is something sacred and special in this sort of situation also, but the reality is that it’s one of the human traps we can so easily fall into when confronted by an attractive person living Gospel love and witness.
May God bless and help her and may God bless the priest, and all in such situations.
As regards confession she should certainly not reveal to this priest that he is the object of her desire, or indicate by any body language or behavior at any time. She should confess adulterurous thoughts in obedice to Jesus’ words.
**Matthew 5:27-28 **
Adultery
27 “You have heard that it was said, ‘You shall not commit adultery.’
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28 But I tell you that anyone who looks at a woman lustfully has already committed adultery with her in his heart.
Or man.
May God give her wisdom and healing and may God abundantly bless her family.

May God protect our priests.
God’s kindest blessings to you and all concerned