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Patty Swanson wrote:

Hi, guys —

I had an affair with my sister's husband. I am now divorced and my sister and her husband are now divorced. I have gone to Confession and asked for forgiveness for my affair and divorce.

My sister's, now, ex-husband and myself continue to have a relationship which is, now, going on three years.

Is this a mortal sin?

Patty

  { Since I have confessed the past and they are divorced, are relationships with him a mortal sin? }

John replied:

Hi Patty,

The answer to your question is Yes.

First of all sex outside of marriage is always objectively wrong and is always a grave matter, which is essential for a sin to be a mortal sin. If you are consenting to this affair of your own free will, and have full knowledge that it is a grave matter, which you do now, it is a mortal sin.

It sounds like you and your brother-in-law simply got divorces. If those marriages weren't both annulled, you are still both married in the eyes of God and the Church so you are not only fornicating but committing adultery.

It is good that your repented of what you knew to be sin but when one repents they have an obligation to avoid the occasion of further sin. They also have to strive to make a firm purpose of amendment in their heart to stop sinning.

I can't judge the condition of your heart or soul but, objectively speaking, you are continuing, at the very least, the sin of fornication (sex outside marriage).

You should immediately repent of this. If you love your ex brother-in-law, then you'll do it for his sake as well. The next step, after that, is to live a celibate life unless your previous marriage can be annulled. Of course, if your marriage is annulled, you are free to pursue a relationship that could lead to marriage but until such time as you can, and do, remarry, you are called to celibacy and chastity.

John

Mary Ann replied:

Patty,

There is one additional concern.

The Catholic Church forbids a person to marry the sibling of his or her previous (presumably deceased) spouse, and such marriages by Catholics are invalid.

Mary Ann

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