Welcome home, mother
Even though moms will go out of their way to embarrass their kids in public, their efforts pale in comparison to what sort of embarrassing stunt their kids can pull. These kids didn’t just put up a public display to let people know their mom was coming home. They took up the entire airport in doing so!
It didn’t take very long for their dear mother to spot the banner. In fact, she could probably see it while still in the airplane several thousands of feet in the air. We’re just surprised airport security didn’t put an end to these kids’ shenanigans. Eh, they’ve probably seen much worse.