Do you think it is possible that she was partially pushing the custody issue in order to get enough $$ in child support to keep the house/lifestyle? I would worry that it might flare up again once she sees the full picture. Not sure what the situation is like in your state though.
Me (46) H (42) M:14 T:18, D9 & D11 4/19 - 12/19: series of escalating BDs 9/20 - present: R and piecing