I'm glad that your problem was easily solved. We had a kitten once that repeatedly peed on my husband's side of the bed. With him in it and without him. We asked the vet and he said he is marking your husband as his. He told us to switch from me feeding him to my husband feeding him. It solved the problem.

A one month old kitten is only about half the way to 8 weeks which is the bare minimum they should leave mom. That explains some, You should get the kittens fixed soon before they start spraying, howling in heat, and cause fire hazards, tom cat urine not only smells dreadful it can cause fires to happen if sprayed on electrical wiring. Contrary to poplar belief it is possible to fix kittens early before 6 months. Its good the parents are nice though as that will make for calmer more well behaved cats . Are they purebred or mutts/moggies? If the boyfriends grandmother isn't a breeder of purebreds and isn't looking to better the breed of choice she is known by society as a (BYB) backyard breeder and should be visiting the local shelters kitten cages and the back room to see their freezer, and what happens to many litters that cannot find homes instead of cranking out more kittens in an already overflowing world of over population. kittens are so plentiful in this day and age that they have become trash animals to biological supply companies / and other unsavory types ect, the lab cost is $5 a head. Furthermore any sane breeder will NOT give away a kitten thats less then 8 weeks old, my breeder had me wait until 11 weeks for Leopalorn.

I know this post is old, but I thought I'd add a tip, for any one new who finds this during their search. The general rule of thumb is 2 litter boxes PER CAT, I know that is not feasible in all homes, I have 3 cats and can only do 3 litter boxes, I personally do not have room 6 litter boxes they'd be sitting side by side - if I did and that just doesn't seem like it would work as it's supposed to. The reason for this general rule of thumb, is that cats supposedly don't like to potty where other cats go potty!, I can't say that I believe that 100% as my 3 cats use only 2 of the 3 boxes, and they have their "favorite" all boxes have the same litter, and basically the same size the one they don't use is actually the biggest.. But if 2 or all 3 have to go at the same time instead of each one going to their own box, they actually will "wait in line"! for the one using it to get out!. Also cats are extremely finicky when it comes to their litter box, they want a spotless, odorless box or they'll refuse to use it (not all cats, some just don't care, but most do). I have 1 when the boxes are not spotless and odorless of any of their own scents, she will not use it, she will go on the bed, the floor, clothes left on the floor, the couch, any where but any box. So we make sure to clean the box at least 4 times a day, with a complete dumping out into the outside trash once a week, and after we dump it all out, we scrub it clean with dish soap and water, dry it, then I put a thin layer of baking soda (even if my litter already contains it), then the litter. I also have a male cat who is very picky about the brand/type of litter we use, if it is not to his liking he will kick it all out and just go in the box after he empties all the litter - much better than going on our furniture, but to be honest he makes a bigger mess for me to clean up, I'd rather wash bed clothes or a fake leather futon couch/bed off than to always sweep up cat litter. And I agree with getting them outside time - they may be doing it out of being bored they're locked in a room (think of it like this, that room is their jail cell, would you want to be locked in a jail cell 24/7 and only get out 1 time a week if that for ''recreation'' ). I have built a fully enclosed cat kennel for my cats I used an old metal dog kennel and added wire to the top as well, They have 2 decent sized logs in it from a cut down tree to sit on and scratch on, they have one long branch that had broken off my tree in there at an angle, they've got a large cooler that has a hole cut into it and it's full of old clothes, straw, and old foam (from outside furniture), this is their "house" they go in when it's raining or gets a bit cold (I have 1 male who prefers to be outside he's happier outside than inside) they also lay on top of it, they have their own cat nip growing in there as well. They love this kennel! Plus they get fresh air, and the vitamins they desperately need from the sun they are unable to get from being cooped up in a house. No cat should ever be strictly an indoor cat - I'm not saying allow your cats to roam your town (if you live in the country and there is not a high chance of them being hit - and you know they'll come home every night - then feel free I did it when I lived out in the country) but every cat needs to be outside for a few hours every day, rather its in an enclosed kennel they can't escape, or wearing a harness and on a lead they can't escape from. But they need outside time! Also they need to spend time with their entire family, cats are social animals, being jailed up all the time is not good for them mentally , physically, or on their over all internal health

What do you mean by "In a confined space without a bathroom he doesn't seem to be able to hold it for over an hour & when nervous he can hold it very well". Did you not supply him with a litter box in the confined space? And, why would the cat be nervous and how did you know he was? What's the household like? Is it a calm house where everyone accepts the cat? This sounds like a stressed cat who needs more litter boxes and a change in environment. Apologies if I'm wrong, but the post has signs of a troll.