Prince William's alleged infidelity to Kate Middleton with Rose Hanbury caused a fracture in their relationship.
This situation resulted in harsh criticism from British society and the whole world.
The relationship between William and Kate hung by a thread due to the situation.
Tom Quinn's book stated that William and Kate had strong fights because of Rose Hanbury, and their marriage is not going through its best phase.
William and Kate have always managed to resolve their differences, with William giving in to Kate's accusations.