Suddenly your partner becomes overly interested in what you're doing during the day. Not just what you do in general but also what you do hour by hour. They want to know where you are every minute of the day because they want to avoid those same places. Your partner wants to spend some private time with their lover in peace while you are somewhere else.
You might think that this sudden interest is because they are interested in you as a person but the truth is quite the opposite. Don't take this as flattery and don't be naive about it. Your partner has planned this very meticulously. This is reason enough to become suspicious of him or her. Maybe tell them where you don't plan to go and just go there.