Responses
I wouldn't really consider it grooming because it's not like he was intentionally raising her to be his wife. He was forced jnto it too, but yeah it helps a lot that they weren't living in the same house for 10 years as she grew up.
It's seriously bad that they got married when she was at such a young age, but I kind of want to point out that at least she wasn't raised by him and didn't live with him. I think it makes it better that his mother raised her away from him, otherwise it would be just grooming. The time of this marriage (an adult and a child) is seriously sick, but I do find it a bit better thanks to her growing up separately.