This film seemed to me to be very little about the relationship between mother and son (only one important scene where the mob boss reproached his mother for being a drunk all his life), and more about a great number of other things. Sibling rivalry, the decadence that accompanies a criminal life, how life and money ultimately become of little value, how love can surface in the most unlikely circumstance, etc etc. The 'hitman' who was exceptionally good at the job and the mob boss fell for the exterminator in spite of himself. The irony of his brother 'sussing' what someone was up to and being over-ridden was not lost on him.
I thought it was a well made depiction of a dysfunctional family and its final disintegration. The storyline flowed, there was great attention to detail - a bug exterminator would be looking in all the rooms and a nervous mob member would get itchy about it - and though it wasn't a Hollywood glitz-flick I thought it was all the more authentic because of it. I really enjoyed it.