In this photo their place looks very nice but actually because they are both intact you'd need to put solid wall between them, because they will be under stress all the time. Also he can manage to get to her over the top, rabbits are very smart especially when there's a nice nursing girl and he can see and smell her all the time. I know he is about 8 years or so but they will be both nervous you will see they will mark their territory with big smelly poos along the wall and maybe will spray each other through it with urine. Best to make it totally solid.
If they will manage to meet again and she gets pregnant again it will be difficult for her since she is still nursing for the next two months and she will have babies in 30 days so you will have to separate her babes from her so she can only nurse new litter, it will be lots of stress, you don't want it and it is bad for her she will be exhausted no time to recover at all.
Here's another thread just a couple weeks ago we had that situation when girl got pregnant immediately after giving birth.
>>
Brand New Kits
They manage because people are very nice and taking a very good care of the first litter, but normally you want kits to stay with mother until 8 weeks and they were weaned at 4 weeks.