"Rest In Peace my love. Words cannot express the hole in my heart. Bobby taught me what true and deep love is. Thank you my love for sharing your life with me," Zarin captioned a slideshow of photos with Bobby.
"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."
"Thank you to all our friends, family and fans for the most incredibly love you have shown our family. The messages bring tears to my eyes and will continue reading them all in the coming weeks," the star added.
"Tomorrow is the funeral so I will sleep now."
Bobby died Saturday at age 71 following a long battle with cancer.
Jill, who said her husband raised her daughter, Allyson Shapiro, as his "own," attended Bobby's funeral Monday at Riverside Memorial in New York.
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"I wasn't sure if I could stand up here today," she said, according to People. "[Bobby] was an incredibly great husband, a great father and grandfather, and [a] truly great friend."
"Today is a sad day with a silver lining. I laughed. I cried. I saw old faces & watched a family come together surrounding a loss. 'I have a dream' that Bobby's death makes us realize what is important & treat each day as our last," Frankel tweeted.
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