Jill Zarin penned an emotional message to her "incredible" late husband on his birthday.

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The 54-year-old reflected on her love for Bobby Zarin on what would have been his 72nd birthday Tuesday.

"Today would have been Bobby's 72nd birthday. The reason I am posting so late is that I spent the entire day going thru 50,000 over the past 20 years," Zarin captioned a video on Instagram featuring moments from their marriage.

"Bobby's birthday was always extra special because we always knew in the back of our minds that the cancer could come back at anytime and to live life to the fullest. So we did. We traveled, spent time with friends and family and most importantly loved each other till his last breathe," she said.

"He was beyond generous," the star added. "Thank you for being the most incredible husband but more importantly my best friend."

Bobby died Jan. 13 at age 71 after suffering from cancer that spread into his lungs and brain.

Zarin addressed her husband's death in an Instagram post the next day, although she said words could not express "the hole in her heart" from his death.

"Bobby taught me what true and deep love is. Thank you my love for sharing your life with me," the star wrote at the time.

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"I will never forget you... your legacy lives on through your beautiful children and grandchildren," she said, referencing Bobby's three kids. "I will continue to honor you and make you proud. You taught me so many lessons."

Zarin is known for starring on the Bravo series "The Real Housewives of New York City."

She said in an interview with People this month that she is considering relocating to her homes in Florida in the wake of Bobby's death.