she should be talking about her concerns, with her Fiance.
Before they get married.
Or see a counselor, pre-marriage.
Her self-esteem is being affected.
Regardless of beliefs per her virginity and his life before her... this is the way it is.
She would, and he too, would benefit from counseling.
Otherwise, this WILL be a PROBLEM... in their marriage too.
AND, no one can solve her self-esteem, except herself.
Her Fiance's life, is the way it was.
She HAS to come to terms with that... because he cannot change his prior life. It just is.
She and the Fiance, have to talk.
IF she cannot talk to her Fiance about this or anything else that is personal... then what kind of marriage will that be???
NOTHING makes her Fiance worse or better than another man, despite their virginity or not, prior.
People, are people.
Problems like this, comes with virginity or not.
It is about her self-esteem and her fears and her inability to accept her Fiance, the way he is and was, prior to her.
She cannot change things or her Fiance's non-virginity.
So she has to come to terms with that.
And marry him or not.
BECAUSE, one thing that WILL dismantle a marriage.. is IF she continues... to have these issues, even after married.
She cannot hold her Fiance's choices in life (prior to her), hanging it above his head... like he is being judged.
And if she continues to be insecure, about herself and sex, even after they are married... this will be, a constant problem. EVEN if her Fiance is perfect and nice to her... she will still have these self-esteem issues and insecurities... and "comparing" herself to the other girl her Fiance had before her.
Do you see?
This is not, about her Fiance's non-virginity.
This is about her.
IF she does not come to terms... about her Fiance and the way he was and his life prior... SHE, will not be giving her relationship, a fair chance.
NO one, would want to be judged, for their prior life, by their Wife or girlfriend. Nor constantly.
She also would be 'wrong' to constantly have these hang-ups, upon her maybe Husband. A Spouse, would be hard-pressed to make someone 'happy'... if they have these issues, even if it is not justified.
She NEEDS to talk to her Fiance, about this.
You said, your Niece feels "Cheated by God... " for falling in love with a Man who was not a virgin.
Gee... that is really hard... for the Fiance.
She feels, he is not good enough?
She really, has to figure herself out.
Or it will be unfair, to her Fiance.
And this has to do with her self-esteem... AND... DOES her Fiance... have the same religious values as her????
If not, that may be ANOTHER problem, in their relationship and marriage and if they have children.
She needs to figure this out. Now.
And talk to her Fiance.
She can't be 'worrying' about comparing herself to other women.
That is, really not, good upon any relationship.
Her Fiance chose her, to marry.
She does not seem, so sure.
She has issues and reservations about HIM and getting married to him... as he is.
Also, if she is not already, she should have an OB/GYN Doctor.
Since she is or will be getting married and to discuss things like birth control etc.