A joke about a child called an old lady.

An old lady pushes an old man in a wheelchair, and the old people call him his wife one by one. A lady next to her envied the old couple's love, so she couldn't help asking him: Grandpa, how did you keep this love all the time? The old man said, in fact, I forgot his name long ago, and I was afraid to ask her, so I called her baby.