Bathroom woes

It's official, we are going to have to do a total renovation of the master bath. I came down the front stairs a few days ago and noticed not only that the crack in the ceiling has got much worse and is bulging and pulling apart, but that there is a new damp spot in the middle that is an ominous blue colour. I don't know if the crack in the shower pan is responsible but as that has been there since we bought the house more than two years ago I would doubt it. I think it is more likely to be a leaky copper pipe somewhere.
A plumber once said that bathrooms weren't meant to be on the second floor and I would agree with that. I'd add that they should never be sited over beautiful waxed parquet floors. I'd be beside myself if the ceiling came down over the floor, so we've stopped using the shower in the master bath and are just using the tub, toilet and sinks. The damp spot hasn't got any bigger and it has dried out so I'm assuming it's the pipes in the shower that are the problem.
We will be spending the Labor Day weekend in the tile shops looking at options and I guess then we'll move on to looking at plumbing fixtures. As the weekend looks like being a washout I suppose it could be worse, but I was hoping we could spend it in the pool and barbequing. We don't seem to have spent as much time outside this summer as we have in the past. I can't believe that summer is over and we'll be thinking about closing up the pool at the end of this month.