M.P.
i agree about mother/son relationships! i have a 4 months old baby boy, who is the sweetest little thing
i live in the princeton area, and i am looking to socialize with new moms as well. the library is a good place, they should have programs. also, (i worked for princeton hospital, now i am on maternity leave, will go back for 2 days a week in mid september,) the hospital has classes for babies too.
for instance they have a yoga class at the princeton health and wellness center from aug 22 nd till sept 26, it does cost money but if you don't mind, its a place to meet other moms
if you are breastfeeding there is a breastfeeding support group every friday in the east windsor medical commons at the UMCP breast health center, i went to a few meetings there
this one is free and its a nice place to meet moms
you can do a search on google for moms groups in princeton, you might find something
good luck and you can always send me a message if you are bored!