My brother had an affair and now the other woman is pregnant, what can he do?

Anonymous

He came forward to me about his issue. My older 40 year-old brother had an affair and the other woman is pregnant.

The problem is I get along with my SIS (I'm good friends with his wife) and she's going to file divorce for sure once she finds out. Their son (only child) just turned 18 last month. I don't know much about why he did it, just that he is remorseful at this moment and is in a big mess. What can he do?

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My brother had an affair and now the other woman is pregnant, what can he do?
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