“I can’t even think of where in BP could you find a non-kosher pizza place” Dominicks Pizza on 8th Avenue for one. Supposedly thats where off-derech yeshiva boys and Bais Yaakov girls think they can go on motzei shabbos without their rebbeim seeing them.
Whats the problem if her kids arent yet chayev to do mitzvos, and they don’t know what they’re eating isnt kosher (so no problem of chinuch)? I know this definitely happens–especially with the increasing cost of cholov yisrol