shyam knows arnav will marry khushi even garima truth comes out.so shyam will definitely stop dadi in exposing garima now.He may ask dadi 2 stay quite till marriage completes and they can blackmail khushi regarding payash relation n will ask her to leave arnav by creating some misunderstandings(taking revenge for 6 mth contract etc) in their marital life.so yesterdays khushi line" reth ki tarah gayab ho jaoongi blah blah will come."
remarriage will happen but seperation too is also going to happen.