b2 visa question in regards with k1 visa... please see explanation.

This seems to be a question of timing and it would make more sense for the families to apply for visiting visas when the K-1 visa has been approved. Once approved, your fiancé may try to work out the timing of his coming to the US vis-à-vis the families applying for their visas. The trick of course is that once he enters the US, he must marry within 90 days. With the present deteriorated status of nonimmigrant visa issuance at most American consulates because of the pandemic, the timing may prove a challenge. Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.