Wow! That was an unexpected turn of events. Bella clearly knows, or at least I suspect that she knows, about Brad and accepts the situation. I wonder what it is about her that Brad knows and accepts, that allows these two to marry and have some kind of mutual understanding.
It is quite a realisation that Bella, knowing - or choosing to know - what she does, is herself known and accepted by Brad in a way that renders marriage not romantic but functional, sustained by a hard, mutual understanding.
Let’s see how this unfolds.