Hi
Please take a deep breath. They have accepted each other. Your girl is making the normal noises for a sow saying 'I am not in season and ready to mate with you' and making the right moves to gently fend off any advances - which he is frankly not pushing very much.
That is pretty much daily life in a mixed bond and absolutely nothing to worry about.
She has likely submitted and allowed him to mount her a sign of her acceptance right at the start. Now they are in the leadership reaffirmation phase and it is frankly as mild as it can get. You can think about moving them into the cage together so you can watch them settling in before the night. But you
have got a happily bonded pair.
PS: Have you considered giving your boy a shorter summer haircut?
Our guide has videos of different methods and pictures for the more delicate areas:
An Illustrated Guide to Hair Cutting