What is the meaning of "b'Vo'ah"?
Radak: It is when she was coming [to her husband's house].
What is the meaning of "va'Tesisehu"?
Radak: She enticed her husband to ask for a field from her father, but he did not want to. (Therefore, she herself asked.)
I.e. with her husband. (PF)
What is the meaning of "va'Titznach me'Al ha'Chamor"?
Rashi: She leaned and caused herself to fall from the donkey [to Kalev's feet].
Rava (Temurah 16a): (She screamed.) She said, just like a donkey screams when it has no food, a woman screams when there is no grain in the house.