Have one in the oven phrase informal
if a woman has one in the oven, she is pregnant.
She quit coffee when she had one in the oven.
My wife is having a bun in the oven, and this is our first child.
Used to say that someone is pregnant
The verb "have" must be conjugated according to its tense.
A humorous way of saying that what one has said is just what they acknowledge and may not be entirely accurate
Mike: Have you returned from your vacation on the beach? Your skin seems to get tanned.
Jenny: My skin is always dark. That's my story and I'm sticking to it!