if that's an apartment and he has kids, then shouldn't you have at least 2 bedrooms and a bathroom?
you should add some carpet on some places and maybe dividers if you aren't putting in walls
i don't know about you but the apartment's here are like jail cells, everything is quite tightly packed in (and in most cases jail cells and prisons here are better than the apartments... criminals even gets playstations to play on... go figure...)
the table with the chairs needs to be widened, it looks way too narrow and so does the bookshelf
also, you may want to, at some point, alter your cushions so they look soft... at the moment they look like slates of granite or something 
having kids i'd expect there to be toys thrown about or tidied up (more likely thrown around if he's gonna kill himself... i figure the kids are driving him crazy and he can't handle the leaving of his wife?)
i don't think the size is too big, you just have a lot of room left to distribute to the other parts of the apartment
that's a "Ch" pronounced as a "K"
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