Joe Wilner continued

There's a set of 13 square (i.e., 620 or maybe 120 film) snapshots, all taken in the same apartment and probably at the same event, and I've made the tentative call of "Joe and Rita's New Baby", because they seem the most at ease with the kid. But who are all the others? And what are their linkages?

 

Joe's new baby

And who is this with Joe?
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Rita's brother? wilner51a

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