This post was written by Olivia Bahou and originally appeared on InStyle.com

John Legend and Chrissy Teigen hold nothing back when it comes to discussing their relationship, and the same could be said of their PDA. John performed a stop on his Darkness and Light Tour at the Theater at Madison Square Garden on Tuesday night, and brought his stunning wife on stage to serenade.

He appropriately picked the song “Slow Dance,” and the two quickly got to grinding in front of the audience. They got into a little trouble, though, when Chrissy's low-cut black maxi dress—which she wore without a bra—slipped out of position and she accidentally flashed everyone in the theater.

The model, who isn’t a stranger to an accidental nip slip, played it off hilariously, grabbing the mic from her husband and saying “sorry” to anyone who may have been offended by her visible boob. John couldn’t stop laughing about the experience, but somehow managed to finish his song without a hitch while slow dancing with his wife.

Ugh, these two.

BONUS: See all of Chrissy's stunning photos from SI Swimsuit 2017!