Does my friend violate Rule 90 days?

[uslover]

Hello,

My friend will have her interview within 4 weeks.
On May 2018, she came to the US under F-1 student Visa.
On July 2018, she get marriage with a person who was in the process of i485 (his mom (green card holder) filed i130 for him). Therefore his category is F2B.
They only celebrated the wedding, not register the marriage.
On Nov 2019, their baby was born.
On March 2020, her husband received his green card.
On April 2020, they registered the marriage and file i485 in the same month.
On April 2021, they just bought a house. Her husband name is on the loan application, but both their name on the title.
my friend is still in college, she maintains her student visa since she came to the US.

They will have their interview in Aug.
Now they are preparing their documents and some questions.
Does his wife violate the Rule 90 days as an international student?
Should they tell the immigration officer that they already celebrated their wedding?


Does anyone with the same situation or have some experience, advice?

Thanks