For the very first time in his life, he is affected. Having been told his entire life that he can't process or understand emotion, he considers it a big deal.
When Mina Harris gets caught red-handed with a wallet that isn't hers, she falls apart. She's tired, lonely and hasn't eaten in days.
Lev offers her an ultimatum... A nice warm bed, a hot meal and a job, or the cops.
Mina takes her chances with Lev.
After all, a person with nothing has nothing left to lose.