I am not sure whether they are the same cat... strays.
and I am suspecting the mysterious water puddle appeared in the middle of my room is also the cat's pee. D:

One morning, I wake up and saw this water puddle on the floor in the centre of my room. It is not on path to my toilet or going out. door is lock, only the window is ajar/open for ventilation, no leakage from ceiling... How the hell the water get there?

After google searching and reading up many haunting stories... there came this possibility of cat sneaking in and relief themselves. -___-;; I of course would rather believe it is the cat than the haunted... >.<