A woman named Kim

Once, there lived a buxom girl called Kim.
She was pretty who longed to be slim.
She gave birth to one child.
For two, husband did chide.
She became fat and failed to stay trim.

Form: Limerick
A Limerick is a rhymed humorous or nonsense poem of five lines which originated in Limerick, Ireland.
The Limerick has a set rhyme scheme of : a-a-b-b-a with a syllable structure of: 9-9-6-6-9.

The rhythm of the poem should go as follows:

Lines 1, 2, 5: weak, weak, STRONG, weak, weak, STRONG, weak, weak, STRONG, weak, weak
Lines 3, 4: weak, weak, STRONG, weak, weak, STRONG, weak, weak