Viewers in the US last night saw Khloe emotionally tell her family that on her birthday last year, then-husband Lamar was with another woman.
Khloe, 30, admitted to lying about Lamar's whereabouts to her family in order to cover up his cheating, and ended up spending her special day alone.
Reflecting on the episode last night, the star said: "This is one of the hardest episodes for me to watch this season. Season nine has been one of the hardest for me emotionally to share with the world. A gift and a curse....
"This episode will of course have laughter and love due to the bond and blessings of my family. To relive such hard and personal moments is difficult. You will see a lot of me on an emotional rollercoster. There is no right or wrong as to how people deal with life."
Khloe filed for divorce from basketball player Lamar in December 2013 following widespread allegations of infidelity on his part.
While Khloe has remained relatively silent about their split, Lamar has made no secret of the fact he misses his ex-wife.
He told Us Weekly in February: "I love my wife. She'll always be my wife, no matter what.
"We don't know exactly if [the divorce is going through]. Only time will tell. I hope not. But even if we were divorced, she would always be my wife."
The couple had married in September 2009 following a whirlwind romance of just one month.
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