While that might be true, you should also consider how everything happened and that she is now pregnant and most likely traumatized. Two things that affect judgement massively. Which also makes the adoption option rather risky, because she could decide every moment that she does actually want to keep it anyway..
Personally, without knowing further intricate details, it already seems like her husband is second fiddle to alot of other factors, which makes this already an undesirable relationship in my opinion..