Yes, tucking that shirt in is a good idea.
One thing we have yet to explore is how MexiMuffs feed their young. One would imagine some sort of blender with store-brand Doritos, cheap orange soda, and jelly beans. Throw it in the microwave, put a nipple on the bottle, and the nino stops crying.
The nutriçion of a Mexiboob must be relatively decent, because most Mexikids aren't nearly as grossly overweight in the back fat area as their mothers. Perhaps there is a hidden nipple on each roll, much like a nursing pig.
We can only wonder. Until one of them flashes me, anyways.