There is not enough information to make any suggestions here.
Reference is made that two parties are involved in each business, but a Schedule C is filed for each.
How are each of the parties involved in regards to capital investment, asset ownership, time involved and compensation?
There are concerns if husband is involved in business which also rents property owned by him. Was the property solely his to begin with? Was there a bonified business purpose if wife transferred any ownership to him?
What are the long term plans and succession goals for each of these business?
How interrelated are the businesses and how much profit from each.
I would refer any legal concerns to their attorney.