Evan Ross Says 'Best Auntie' Tracee Ellis Ross Stepped In to Read for Daughter Jagger's Class (Exclusive)

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"Jagger was so happy," Simpson Ross tells PEOPLE

<p>Jon Kopaloff/Getty; John Nacion/WWD via Getty</p> Ashlee Simpson, Evan Ross and Tracee Ellis Ross

Jon Kopaloff/Getty; John Nacion/WWD via Getty

Ashlee Simpson, Evan Ross and Tracee Ellis Ross

Evan Ross and Ashlee Simpson Ross had an extra special babysitter this week.

On Tuesday, the famous couple stepped out together at The Chivas Regal Golden Hour Soiree at the Hotel Chelsea in New York City. Chatting with PEOPLE, Ross and Simpson Ross revealed that they tapped in the actor's sister Tracee Ellis Ross, 51, for some aunt duties while they attended the event.

"I feel like it's so important, because we're parenting all the time, to have those moments alone or with our friends and have a date night is always special," Simpson Ross, 39, tells PEOPLE.

"It's the best. And we got the support. My sister right now is actually, Tracee is doing our daughter's class," Ross, 35, shares. "She's reading a book."

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Related: Ashlee Simpson and Evan Ross Are 'Leaving the Door Open' for Baby No. 4: 'Never Say Never' (Exclusive)

"I was supposed to read for her class today, but we came here and Tracee took over and Jagger was so happy," the mom of three says.

"She's a good auntie," Ross adds. "I was like, there's an auntie award right there. Best auntie," Simpson Ross agrees.

Earlier this month, the couple revealed to PEOPLE whether they would consider growing their family.

The couple is already parents to son Ziggy Blu, 3, and daughter Jagger Snow, 7. Simpson Ross also shares son Bronx Mowgli, 15, with ex-husband Pete Wentz.

"We'll see, but I think so," Ross first responded when asked if the couple was done with having kids. "You never know."

"He's open. I'm more like, 'Eh, I'm about to turn 40,' " Simpson Ross added. "But hey, never say never! I feel like once you get a kid in kindergarten, you're like, 'Am I done?' We'll always leave the door open."

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Read the original article on People.