The 51-year-old Watch What Happens Live host added that he was specifically asked not to mention anything by the 58-year-old Real Housewives of Beverly Hills star.
"She asked me not to mention it to anyone at all, so I respected her wishes and did not mention it on the air," he replied in a second tweet. "And before you yell at me for not mentioning it tonight, I want you to know that we pre-tape our Thursday shows."
She asked me not to mention it to anyone at all, so I respected her wishes and did not mention it on the air. And before you yell at me for not mentioning it tonight, I want you to know that we pre-tape our Thursday shows.
Cohen previously shared his love for Vanderpump earlier this month when she announced her departure from TheReal Housewives of Beverly Hills after nine seasons.
“She is iconic and I am so glad that we will continue to see more of Lisa in all of her glory on Vanderpump Rules," he gushed on his SiriusXM radio show. "I guess that's what mitigates the loss of her from Beverly Hills -- thank god I still get to see her on Vanderpump Rules! She will always be the queen of diamonds in the Bravo universe.”
As for Vanderpump, her rep told ET on Thursday that she's "shocked and devastated" by her mom's unexpected death and that her family and friends ask she be given privacy at this time as she prepares to head home to London, England. In the interim, she has taken a break from filming Vanderpump Rules.
For more on the reality star, watch the clip below.