Oh my God! 13 BTC just stolen! Very sad , very very sad. I am feeling too much bad by thinking that 13 BTC stolen! OMG!
But Don't lose your hope man! Please be patient . Everything may will okay. I will Pray for you, hope you will recover your lose.
Yes dont expose your private key to anyone in your family because that's the most important thing to do when you transac in your bitcoin it's better to keep it good and keep your duplicate on your private key to avoid losing your btc that's good to do.