Had interview 2 weeks ago under 3 year rule, pending i751. Came to us as a k1 and had my AOS interview in the same office. Completely regular and was not expecting an interview for I-751.
n400 did not mention my husband at all, nor had any interview set for combo. My husband came anyway, we thought maybe they’ll let them in the building so I won’t wait alone.
IO, first took in my husband for an interview. It was funny cause I was telling my husband they probably never even talk to you, and also explained how some people get stokes and what that is 😂 our interviews were always mellow before n400. N400 was nice interview too but I really was confused for a sec.
anyway 10 min later I went in and officer continued with 2 of us together. Continued to my civics etc.
so I don’t really think there’s a definite rule there
To sum up
- nothing regarding husband coming to interview on paper
- was not expecting interview for i751 nor had any change to my status regarding interview
- husband went in alone at the start
- they did my civic test etc all with my husband there sitting next to me
- Got approved there and oath in the next ceremony same day