Testimony confirmed she was very religious, but no testimony suggested Cooper was a second priority- if anything, just the opposite, even to the extent that she put Cooper ahead of her husband (think of her texts to RH, including not wanting to go on a vacation with Ross without Cooper, because she'd just returned after being away for a week and didn't want to be separated from Cooper again).
Marriages are sooooo complicated, and imo it is just flat out impossible to ever know what is really going on in any one else's (and often enough, not even in one's own.

).
Remember, for example, that Leanna was responsible for the family's finances (only was different towards the very end), Leanna who decided they weren't in a position to buy a house, Leanna who checked daily to make sure Ross was essentially doing what he was supposed to be doing .
None of that is submissive in the slightest. As I've said, I think Leanna is, and likely was back then, a formidable woman.