I also remembered another Bhabhi connection: Sunil Nagar, the actor who played Kalnemi in DKDM, acted as a police officer in Bhabi. I'm not sure if he had any scenes with Mohit or Tarun, though.
And Mr Nagar also has some mythological show connections that you may or may not find interesting - he played Brahmadev in Dheeraj Kumar's "Om Namah Shivay" series, and he played Daksh Prajapati in Mr Kumar's "Shree Ganesh" series. So yet another actor in DKDM who has played roles that feature in DKDM, in other shows!
Bollywood
Mahabharat Katha
