I'm not sure, but it looks like the return address is yours.
Isn't it that PoS is kind of like mining, you mint coins by holding them for a certain time. So maybe the minted coins are just sent to the blockchain for verification?
Someone will know the answer, so I'll bump this.
Yep, it appears that this is the case! I didn't even know that this occurred without setting it up, and never did, so it freaked me out! Guess I should've did some reading!!