As Golden sunrise Ranch said, ours have babies in 31 days also.
I was looking at your pics & if I read the captions right, the white male rabbit is the male you are using to breed, right?
The pictures may not show the sizes of your rabbits very well, but I'm not sure I would breed him to your doe. She looks like a small breed rabbit in the picture. The buck looks like a large breed. In my opinion this may give her some trouble having kits.
I never use a large breed buck with a small breed doe. I will, however breed a small buck to a large doe if I want to get some medium sized rabbits.
When we breed, we also take the doe to the buck. We stand there & watch them. The buck will "hump" the doe whether he breeds or not, but if he actually breeds her, he will scoot his back legs forward, fall onto his butt, then fall over backwards or off to the side. Some of our bucks will also squeal at this time.
If the doe won't breed, she is not in heat. We check them daily, morning & evening, until she comes in & breeds. After breeding, we take her out & wait for about 10 minutes & try again. We may do this 2 to 3 times. We do have some bucks that will breed does several times in a row while she is in their pen.
We also try again the next day, but most of our does only will breed one day, and a few will breed for 3 days in a row.
Keep us informed how it goes. And you can also email me too if you have any more questions. I can tell you what works for us.
Jean