It all comes down to luck, in the end, and no one in their family has really had much of it. Mother's first fiancee going crazy, father's parents dying at such an early age -- not to mention Violet being so far away and Sunny being...
...And Sunny's light having gone out.
So Klaus sits in the alley behind a bookstore, waiting for the customers to leave, hoping that the owner forgets to lock the back door, again. Because that doesn't mean he's breaking the law when he comes in at night, resting his head on the arm of a rather nice plaid sofa. It just means the owner's irresponsible.
He misses Violet and Sunny, even more than he misses their parents. Traumatic events have a way of strengthening bonds, and he cries on the arm of that plaid sofa, sometimes. Cries because life is too short and much too unfair. Certainly, such a small child as Sunny shouldn't have died that early.
Certainly, Violet hadn't deserved a bit of what happened to her. Hooks are such deadly things, after all, and she'd become so strange since they'd been running for their lives.
There is no way, Klaus tells himself, that she knew what she was doing.