Anyone else believe that Tony had Hesh's girlfriend murdered in 6 pt 2? But why is the question.

Look at the way Tony looks when he's coming out of Hesh's house to drop off the balance of the money he owed. It's Tony's "what did I do?" look when he's guilty of something. The next look he gives is his one of his many looks of satisfaction.
So that Tony had Hesh's girlfriend murdered is pretty obvious to me. The only reason why that I can think of is to show Hesh that Tony can do anything he wants — be it paying him back money or having murdered anyone he wants.