David Spade Breaks His Silence After Sister-in-Law Kate Spade's Death: 'I Still Can't Believe It'

David Spadeis mourning the death of sister-in-law and designerKate Spade. She was 55.

The actor and comedian, 53, paid tribute to the beloved handbag creator on Instagram Tuesday, hours after news of hersuicidewas made public.

“Fuzzy picture but I love it. Kate and I during Christmas family photos. We had so much fun that day. She was so sharp and quick on her feet. She could make me laugh so hard,” wrote David, who is the brother of Kate’s husband of 24 years and Kate Spade New York co-founder,Andy Spade.

“I still can’t believe it. It’s a rough world out there people, try to hang on,” David added.

Also onTwitter, David wrote, “Katy at my book signing. I love this pic of her. So pretty. I don’t think everyone knew how f–king funny she was… Its a rough world out there people. Try to hang on.”

David Spade/Twitter

RELATED VIDEO: Kate Spade, 55, Found Dead in N.Y.C. Apartment from Apparent Suicide

A housekeeper discovered her, according to a police source, and she left asuicide noteaddressed to their only child Frances.

Matthew Simmons/Getty

A source told PEOPLE that “Kate and Andy were havingrelationship problems” recently as the father of one wasreportedlyshopping for a new one or two-bedroom apartment in Manhattan.

On Tuesday, David was spotted looking solemn in Los Angeles as he gave a female friend a hug.

If you or someone you know is considering suicide, please contact the National Suicide Prevention Lifeline at 1-800-273-TALK (8255).

source: people.com