pushing?

Bee • Mommy™️, mother of two, fiancée, Baby 3 due 6/8, its a girl! 💗💗💗
Is it normal to let someone push for three hours then make her stop and have her go to sleep for an hour while the baby is crowning?
My best friend has been in labor for nearly 24 hours and after pushing for three, almost four hours, they're making her stop even with the baby crowning and having her go to sleep. 
Seems unnatural.