Turns out the offending culprit was the bathtub. To test the seal, the plumber filled the bathtub with water and let it sit for a few
The plumber had to come back and cut a hole in the ceiling to access the pipes. He fixed the seal and now this ceiling needs repairing....
On the plus side, the bathtub is in, the toilet is in, and the cabinets, sink and backsplash are done!
My next post on the bathroom will probably be the final reveal! I know I'm excited to see it complete and my parents' can't wait for it to be done and to start using it too!