F4 relatives divorced, remarried and had children while waiting for immigration. How to change and increase the immigration applications of their current spouses and children?

Hello, you don't need to submit spouse information in the first step of relative immigration application. After your husband's application is approved, the National Visa Center will inform your husband and his sister to submit visa fees and documents if the schedule comes again (F4 category is about 13). You only need to provide your information in this step. Then you can get a green card with your husband.