If someone came to the US with F-2 visa while she and her husband(F-1 visa holder) are not US citizens nor permanent residences, and their marriage happened in their home country, can she(F-2 visa holder) request to terminate her F-2 status and just after that marry with a US citizen?
Is it needed to get a legal divorce either within the US or their home country embassy before she can marry a US citizen even if she has terminated her F-2 status?