help this house

my mother has 2 cats kathrine who is calico and skeeter who is a long haired greyish blue cat he look like a ragdoll but im still tring to fiqure that out.anyway skeeter is 9 years old he's causing alot of trouble to my moms home when it comes to digesting he'll piss on the bed and other places or he'll lay in the litter box all day causing kathrine to piss in other places. what can we do here?help

It's possible Skeeter is territorial over the other cat. Just make sure you clean up the pee from all the place they'v peed in the past, with a strong cleaner that will get rid of the odor completely, or the cats will smell their urine and continue peeing in the same places. Try to entice the cats to play with each other with toys, and give them treats simultaneously, so they get used to being "equally important". Also, if they aren't spayed or neutered you may want to consider, because that has a huge affect, as they become much more territorial.

Get a second litter box and put it a little distance away from the first one. Then both of them can have their own box.