urgent :follow up interview

[mevvy]

i appeared in my AOS interview on nov 28th 2007 with my u.s citizen wife.i have been out of my student status for a year and we didnot got any specific answers on our interview just that they will contact us in a month's time for further action.
now i got a letter titled follow up interview on jan 23rd. what is this follow up interview .is this interview for checking whether our marriage is a fraud or is it a pretty mormal course of action. did anybody else who is applying for marriage based aos got followup interview letter too.
i would really appreciate of anybody would give me any information about follow up interview and what to expect.
thankyou

[PraetorianXI]

This will probably be a stokes interview. Where they will separate you and your wife and ask you the same set of questions and your answers MUST match.

USCIS was not convinced that your marriage is real.

Read here for more information: https://www.immihelp.com/family-base...interview.html