Bella has a secret--she is in love with a man she met at the movie
BELLA: Is Momma home?
JAY: No, she’s still at Aunt Gert’s.
BELLA: I don’t want to cry. I don’t want to cry. I don’t want to cry.
[... … …]
JAY: He had an uncle in Poland who died. He left the money in his will for Pop.
ARTY: You think the Germans would let some Jew in Poland send nine thousand dollars to some Jew in Alabama?
For full extended monologue, refer to the script edition cited here: Neil Simon, Lost in Yonkers, in The Collected Plays of Neil Simon, Volume IV. Simon & Schuster, 1998, pp. 113-116.