"There was a moment when you couldn't walk a block in NY without seeing one of her bags, which were just like her; colorful and unpretentious", Wintour said in a statement.
Mr. Brosnahan said he and Ms. Spade had discussed "her sadness, which is what we liked to call it".
He said her death was a "complete shock". He said they were living blocks from each other, and their 13-year-old daughter, Frances Beatrix, was living with both of them.
"I, personally - I don't know about Andy - took off a good nine years raising my daughter, and absolutely adored every moment of it", she said.
Spade's company also put out a statement about the suicide.More news: Apple’s MacOS Mojave a definite attempt to boost productivity
Saffo also told the newspaper that her sister was particularly interested in the news coverage of comedian Robin Williams' suicide in 2014. "It was a time in the marriage when it was right for them to be apart", she said.
In the years before her death, Kate gave no hint that she was unhappy. "We loved each other very much and simply needed a break", Andy Spade added. She could make me laugh so hard.
David wasn't the only famous relative mourning the designer's shocking passing - actress Rachel Brosnahan uploaded a poignant video of her aunt, the former Katherine Noel Brosnahan, in which she could be seen laughing and dancing with husband Andy to a mariachi band at a holiday gathering.
If you or someone you know is struggling with depression or has had thoughts of harming themselves or taking their own life, get help.
The Instagram picture shows Kate and David standing together, and the caption reads: "Fuzzy picture but I love it. Kate and I during Christmas family photos". Long before we talked about "authenticity", she defined it. So pretty. I don't think everyone knew how f*cking amusing she was.
For those suffering from depression or contemplating suicide, contact the National Suicide Prevention Lifeline at 1-800-273-8255.