Sometimes a letter from the initial attorney explaining the process works.
An approach that may not be preactical but could work is to invite both parties
to a sort "orientation" by one or two collaborative lawyers.
There is a need to talk to your client about whether or not his/her
presentation directly to the spouse will be the kiss of death. If so, then
alternate
solutions need to be explore. e.g., is there a therapist or
minister/rabbi/priest that has the others trust so my be inrolled as
intermediary.
Stu