Mom sends son to school in inappropriate "McDonald's" shirt

A Mom in Texas is apologizing after sending her son to school in a very inappropriate T-shirt.  She said someone gave her a bag of clothes and she just looked quickly at it and thought it was McDonald's and sent her son to school in it.  Only after he got home did she notice!  I wonder if anyone at school noticed but didn't say anything?  LOL!  My big question, why make that shirt in a kids size ANYWAY!!!