^^ if that is true, it's particularly heinous. You are still post-partum. Hormones still adjusting, sleep deprived.
If he wants to help you financially, would he be willing to hire a mother's helper, or a housekeeper who can give you some relief with the household chores or keeping the toddlers occupied, especially during the early evening/bedtime hours?? I imagine that time of day might be really tough.
