Also remember, like a wedding, after a funeral things start to flood into the mind a few days after. During the time, it's just a matter of being there.
So understand that it is VERY likely that she might start reading your actions during this time and the funeral as being inside her created boundaries.
Be prepared to have to back off a LOT within a week or so following. Again, following the rule. Be there for her if she asks, but otherwise again, maintain respectful distance.
As far as cremations, most I have been to have still been traditional. Only two that had no mass, just memorial / graveside service. So same rules apply.
Also know... the funeral home will know protocol on this. They will (should) tactfully discover the family dynamics and determine best arrangement. If you want to know in advance you could contact the funeral chapel to find out how the deal with separated family members.
