Ariana Grande continues to add onto her collection of tattoos with a purpose.

The singer, engaged to comedian and actor Pete Davidson, most recently got a tattoo in honor of Davidson’s late father—a firefighter killed in the September 11th attacks in the United States. The new ink comes in the form of the numbers “8148” according to People, which was the Scott Davidson’s badge number.

Pete Davidson has the same tattoo on his left forearm, although it is much more pronounced than that of his fiancée’s. It isn’t the first matching set of ink that the couple has gotten. Previously, they both got one that reads “H2GKMO” in honor of Ariana’s favorite phrase, “Honest to God, knock me out.” They also copped matching cloud tattoos on their middle fingers.

The new gesture is rather decent in relation to Davidson, who doesn’t have too much of a history being shy with his father’s death, notably making jokes about the situation in stand-up routines. It may be his own method of therapy, but recently that tactic has gotten him in some hot water as footage of a routine from October of last year resurfaced.

In the clip, Davidson is seen making a quip of the bombing at Ariana Grande’s concert in Manchester that left 12 people dead last summer. The joke was about how Grande must have understood her level of fame after the bombing as even “Britney Spears didn’t have a terrorist attack at her concert.”

The mother of one of the victims spoke out, telling the Sunday Mirror that, "For anyone to joke about this situation is disgusting and I think he should publicly apologize for it."

Jade Clough, a survivor of the attack show suffered from nerve damage and emotional trauma called the joke “disgusting.”

"This isn’t something to joke about, it was a terrorist attack targeted at children," said Clough. "You don’t joke about things like that in a stand-up comedy show."

The Manchester attacks were another occasion in which Ariana turned to ink to pay homage as she got a tattoo of a worker bee to symbolize Manchester and honor the victims. She returned to Manchester a month after the attacks and helped raise $3 million in a benefit concert for the We Love Manchester Emergency Fund.