Our house has only 1 bathroom. My husband takes a while with his shaving, ect. in the morning. I would rush to the bathroom door and say in a pitiful little voice Coming Out Soon? Some times he was on the toilet himself and could not be rushed which led to disasters.
What cured this bathroom problem is I put in a home health care kind of a potty seat in the 'mud room", a sort of small auxiliary room out the back door. This little porta potty was a relief when I had to go immediately. It's a sort of toilet seat on a rack that has a plastic bucket under it. I line this with plastic bag then put some cat deodorizing cat box litter on it. No more urgent bathroom fiascos.