Do you recognize? Can you help? #photographs

Lawrence Weintraub

Attached on Viewmate
you will find a photo of my grandfather Louis (born Leib) Weintraub with his wife.  I am uncertain if this is his first wife Gussie (Schwartz) Weintraub, my grandmother, or his second wife May (Scheineblum) Weintraub.  Louis and Gussie wed January 5, 1913 in NYC.  I am uncertain when they divorced though apparently in the 1940's (still together on 1940 Census).  I think Louis remarried shortly thereafter though I don't have documentation of either the divorce or the remarriage.  Louis died in 1951 and is buried in Mt, Hebron in Queens, as is his second wife.   Louis' first wife Gussie died in 1950 and is buried in Mt. Moriah in NJ, both deaths occurring before I was born.
In summary, there are three open questions where I would appreciate help (the first a long-shot):  1.) which wife is pictured, Gussie or May?  2.) when did Louis and Gussie divorce?/documents and 3.) when/where Louis and May marry?/documents.
Thank you very much for any help.
Lawrence Weintraub
Old Bridge, NJ

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