Being a mother is never easy. But when you're a single mother who happens to have a daughter who's as stubborn as a mule, it gets even harder. One particular night, Dinky seems to be pushing every one of her mother's buttons. But what will happen when Derpy finally decides enough is enough?

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Happy Mother's Day, 'errybody! Go have a good time with the one woman in your life you owe more than anything.

Derpy explains her medical condition to her daughter.