Here's a possible scenario : let's suppose this is the situation
She 38 years old, 5 months pregnant, and potentially both tired and physically uncomfortable due to pregnancy. He wants to run around chasing virtual Pokemon rewards, which is not quite the same frame of mind as a woman who is 'nesting'. She gives her phone to him because she's not interested in the game, or perhaps her battery is dead. They mess up with the busses, making her more uncomfortable due to pregnancy. Additionally, second trimester hormones cause her to experience emotional reactions that are exaggerated, and which surprise her. This is where they part ways.
Her frame of mind may be that he is unsupportive of the pregnancy, that she doesn't really want to spend the next 20 years raising a child, and that she sees no way out. If someone has a location for where they parted ways, I'll put together a map at the end of the day today of places where she may have gone.
Do friends and family know of a favourite place where she liked to walk or think? For example, some people like to walk along a river to think and clear their head.
