Space Mountain (Disneyland) Puns

My sister and I were next in line for Space Mountain. Unfortunately, after around 30 minutes of waiting, the crew in charge announced that they are going to go under maintenance. Some Russian kid behind us (around 10 years old) screamed, "MOTHERFOOKER!!!!!" My sister thought it was really funny so she told my dad the story, but used motherf-er instead. She then asked, "Wait, you know what motherf-er is, right?" to which my dad replied, "Yeah. She's the wife of fatherf-er."