Hmm. But regardless of whether there was a child, their marriage contract might well give her financial/material resources as a widow that she didn't have before. I researched the situation for widows in France when I wrote my poly fic, and they were not left with nothing! The situation varied in different parts of France, but they could in some cases be left with a fair portion of their husband's estate.

*determines to research the inheritance situation of widows in Scotland*

But yeah, obviously a pregnancy would be a risk!