I believe the wife is also a business consultant, so she may not be financially deprived.
Assuming the house was jointly owned property, the insurance underwriters and lawyers will likely go round and round on this one. If this kamikaze dive was attempted murder rather than simply a very dramatic suicide -- and who can now know his full intent -- then she might be in a better position to collect on a claim.
The plane was apparently owned by their business corporation, and business insurance policies might indemnify other co-owners of a business from the rash acts of a principal.