Rita Ora and her casual BF Rob Kardashian may or may not have just committed a cardinal (make that “kardinal,” since those Kardashians are obsessed with the letter “K”) sin and offense when it comes to tattooing. If the tatts that Rob tweeted are real (and we’re confident they’re not), which feature his name inked on the singers knuckles and his inked on hers, then this relationship certainly won’t last. You never tattoo your significant other’s name on you! It dooms the romance.

Rob tweeted a photo of his hands interlocked with Rita’s, posting: “S— got crazy tonight… What can I say… #tatmynameonya.”

We don’t think Rita had one of those nights like she sings about in ‘How We Do (Party)’ and we aren’t afraid she’ll live to regret a permanent reminder since the tatts look bogus. In fact, they look like jailhouse stick ‘n’ poke tattoos.

They’re not well-done and look poorly etched and hardly artistic. Knuckle tatts are also a big deal, since they are nearly impossible to hide and we doubt a pop star like Rita who is photographed at every turn will want such a trashy piece of ink showing up in every shot.

Something tells us from the style, the lightness of the lettering and the fact that Ora went on record to say that the relationship is not that serious makes us think these are temporary or fake. Jeez, Rita’s mani is more artistic and interesting then these tattoos.

In her Complex cover, Ora declared, “I mean, it’s not really a relationship. It’s not that intense. He’s a cool guy. We’re close. We’re good friends. I got his back and he’s got mine.”

Having each other’s back doesn’t translate into “Tatt my name on you for life.” These have probably already been washed away.

Watch the Rita Ora ‘How We Do (Party)’ Video