Not sure what you and wife's life experiences are like, but I have found, people that travel a great deal or who have lived in other countries, are far more likely to be flexible with their diets/food choices. We simply have had to try things that looked "questionable" to be polite and discovered they were absolutely "divine"!
She could just be more curious about things, feels like her life has changed so much recently, that what the heck! Tried it and liked it. Could very well be hormonal. Could also be an indication of something her body is missing during this stage in her life. Most times, we crave something for a good reason. Most of us quite instinctively will find what it is our bodies seem to be craving. Quite frankly, we spend most of lives IGNORING what our heart, body and minds tells us would be good for us. I think we have far more INGRAINED memory knowledge then we realize. Perhaps, MLC brings out that NATURAL trait, that all of us have, as we read and watch, every article, document and tv program out there, that TELLS us what we should be feeling, thinking, doing!
So often we go through life blindly, routinely following the WAY WE DO THINGS. Perhaps when our mental attitudes change, everything else changes with it. Good question though Bailmore. I guess you could say, WE DON'T KNOW!!
HUGS Stayed