Welcome to the forums, thanks for joining! At the least the pair seems bonded, the first step towards an inclination to breed. Please carefully consider whether to breed, as it is an awesome responsibility.
Do you know the age of both, and especially the male? It is possible he is young and needs to mature a bit. Many pairs will wait until they have the "ideal" environment to set up a family. Always a mystery, but feeling safe with proper nutrition is a first step.