I have 2 BP's in my tank (Dudley and Deloris) and although Bp's are generally sterile I have successfully had fry 3 times. D&D are very bonded. I had Dudley first and he wasn't doing well, he was my first ever fish and I was inexperienced. In fear he might die I was asking the pet shop advice and they had another beautiful BP that I picked up as a replacement. The moment I put her in the tank he was a whole different fish. He became bright orange and literally swam circles around her (wish I had video of this). They have lived together in a cave for about a year now.
The first fry they produced was a few months after they bonded. The fry died after a few weeks (I believe because i separated them from the parents) I was still very new and didn't know what to do. Then there were no new fry for 6 months.
Now they are having babies again. I have one fry left from the second batch (again I separated them and they quickly died off, so I put the last one back and surprisingly D&D didn't eat it). This one is doing well and he is probably 1 month old. He is being fed Small Fry liquid food.
My newest batch are about a week old. They don't yet show up in pictures but I have a video if there's a way to upload it. I will not separate them so hopefully many more survive this time.
I have pics and videos of these guys but i can't figure out how to upload them.