It's sad to think even with 11 BTC holdings, OP didn't even think of buying a cold wallet to protect his investment. It's a huge amount of money, and shouldn't take it easy when it comes to security. I agree with you, this won't happen if he has a hardware wallet. His wife may not cause a hack if he at least think of the security of his holdings.
I think we shouldn't make assumptions in this case. OP still has not shown real proof that he owned 11 bitcoins to begin with, even though he said he would provide evidence. The only parts of his story that have been confirmed are a couple blockchain transactions, but honestly those could mean anything - for all we know, he just found some random transactions on the blockchain and claimed they were hacks.