Since your husband got the mistress pregnant this is good grounds for divorce. Your husband is entirely responsible for paying child support and this is called being responsible for your own actions. Your husband is fully to blame as he either started the affair or he could have said no to the woman. Therefore, the mistress who is pregnant has every right to keep her child. Your husband has created a great deal of pain for you or any children involved in your family; he lied and disrupted your lives and cost the most precious thing of all ... trust in each other. Most people who cheat will do it again.
Because it's the order of things when a woman get married, her life changes from a single woman to a married one. I guess we can ask mother nature because she's the one that only knows the plan for...
This can be more common than you know. Pregnant women go through so many hormonal changes and they can be depressed because of water retention and weight gain or they can be moody one minute and...
If she can prove paternity, there might be some child support due. But, the husband would be the legal parent, if his name is on the birth certificate.