You may want to make explicit that Sarah is speaking of the pleasure of having a baby. Sarah used this rhetorical question because she did not believe that she could have a child. Alternate translation: "I am worn out and my master is old, so I cannot believe that I will experience the joy of having a child."" (See: [[rc://en/ta/man/translate/figs-explicit]] and [[rc://en/ta/man/translate/figs-rquestion]])