kallah teacher and chosson teacher must be on the same page and should be in contact regarding certaain things, and certainly should be aware of each others’ hadracha
chosson and kallah should not learn together before wedding. that said, and for that reason, there is a fantastic kuntres from R’ Daniel Frisch- 2 of them actually, Yom haChuppah l’Chosson and Yom haChuppah l’Kallah which it is nice and short for each to go through on their own