Doug Heffernan: Hey, Deac, let me ask you, do you think Carrie's gained weight?
Deacon Palmer: Say what?
Doug Heffernan: Carrie, my wife, do you think she's gained a little weight, a couple pounds, maybe?
Deacon Palmer: I don't know. Every time I see her she's blocked by you.
Carrie Heffernan: Honey, if he didn't drive me home then we wouldn't be able to have sex in his car!
Carrie Heffernan: I have a surprise for you.
Doug Heffernan: You're pregnant. Yes!
Carrie Heffernan: No.
Doug Heffernan: Thank God!
Answer: Sara hasn't been mentioned in later episodes, and it suggested in later episodes that she never existed, and that Carrie is an only child. Kevin James stated that the producers couldn't think of an good plots to use with Sara, so they left her out.