I would just let it go, like quacker said.

And regardless of her situation, oopses are no reason to get married, and are most likely why the divorce rate is so high...I wonder if there has been a study about that...premarital sex leading to pregnancy to 'forced' marriage to divorce (divorce after holding on the relationship for 5 extra years "for the kids")?

per aspera ad astra: Through rough ways to the stars...