Marriage before I485 queri

[slsheth]

My daughter and her fiance are on H1b visa currently.
Her fiance has applied for Green card and presently he has received queri for additional information rgd I 485.

We were advised that they should get married immediately before replying above queries for I 485 so that the procedure to get green card for my daugher also will be speedier.If they get married after her finace gets green card,there will be very long and time consuming procedure to get green card for my daughter.

Pl advise ,thanks