“David was by Victoria’s side the whole night,” a source tells PEOPLE of Victoria Beckham’s party celebrating her Reebok collection

Victoria Beckham had a special person by her side while celebrating this week — her husband David Beckham!

The two stepped out to tout her Reebok x Victoria Beckham collaboration at a party in New York City on Tuesday night, which the couple’s oldest child Brooklyn, 19, also attended with his girlfriend Hana Cross.

According to a source, David, 43, was an attentive and supportive husband at the party while Victoria, 44, celebrated her collection.

“David was by Victoria’s side the whole night,” the sources tells PEOPLE. “They were very touchy and flirty with one another.”

The Beckhams will be celebrating their 20th anniversary this summer after tying the knot at a sprawling castle in Ireland on July 4, 1999.

David previously opened up about their marriage and why being married for so long can be challenging.

“To have been married for the amount of time that we have, it’s always hard work,” David, 43, said on the Australian TV show The Sunday Project. “It becomes a little bit more complicated.”

 David Beckham Talks About His Marriage to Victoria Beckham: ‘It’s Always Hard Work’

David also mentioned the couple’s children: daughter Harper Seven, 7, and sons Cruz David, 13, Romeo James, 16, and Brooklyn Joseph, 19.

“Sometimes it’s the little things that make a big difference, and I’ve noticed that with my children,” he said. Reflecting on media attention, he added, “The thing we have to do is protect our children.”