Sentence 1: Bill and Dan used to be best friends when in college together. 
 Sentence 3: One day Bill came home to find Dan in his home, with Bill's wife 
 Sentence 4:  Dan and Janice, Bill's wife, informed him of their relationship 
 Sentence 5:  Bill stormed out and never spoke to Dan or Janice again 
 Option 1: They used to argue about having a startup tech company. 
 Option 2: They used to talk about having a startup tech company.