Can the Fiancees children come to the United States prior to the marriage?
Yes. Children are eligible for K2 Visas which would allow them to accompany the Fiancee or follow the Fiancee within 6 months of visa issuance. If the children do not apply for a K2 Visa, they may also be eligible for a K2 Visa after the Fiancee is married as long as the children apply within 1 year of the Fiancee’s K1 Visa issuance.