It's hard to say for sure. Ana could be a blend of real experiences and creative imagination. Maybe it takes inspiration from real-life situations but is not a complete account of actual events.
Well, it could strengthen their bond. The idea of having a child together is a huge step, and they might become more united in their goals for the future. For example, they could start planning for the baby's future, like where to raise it and what kind of education it will have.