I have a problem. I am pregnant, but it is my husband’s brother’s and no one knows about it except him. advise me what to do. I am going crazy

I made a big mistake. My husband’s brother is single and he has been following me since the first day we met. I didn’t say anything to my husband about this and I made a big mistake. In the end, one day he got what he wanted. I have two children, they were born a year ago, they are twins.

Now I am pregnant again, but I know for sure that the father of the baby is my husband’s brother.

He offered me to have the baby and run away with him, but I love my husband very much and I can’t do that. On the other hand, I do not want to get rid of the baby. This is my baby and I want to give birth.

Give me advice please. I do not know what to do how to get out of this situation I am already confused.