Jennifer Lopez and Ben Affleck seemingly got into a heated argument at the Grammys but no one knows exactly why.

But a source recently claimed to know all the details and shared it with Heat UK.

The insider claimed that Lopez called Affleck’s attention after noticing that he was making faces throughout the awards show.

“Jen was livid when she saw the faces Ben was making during the show. She knows it’s part of their brand to be seen looking madly in love, so she snapped at him and told him he needed to be on his best behavior,” the source said.

The insider added that Affleck’s recent reunion with his ex-wife Jennifer Garner, as well as the latter’s boyfriend John Miller, upset Lopez.

“Ben’s gone from being standoffish around John to trying to be his buddy, inviting him for workouts, to grab a coffee, or watch sports. But Jen’s not much of a fan of any of Ben’s buddies – not even Matt Damon or Ben’s brother Casey. But for him to become friends with John has really touched a nerve,” the source said.

But while it is true that Lopez and Affleck seemed as though they were fighting at the Grammys, it’s unclear if the public’s observations were accurate because they never talked about it.

So, it is possible for fans to have misinterpreted the couple’s body language and lip movements during their latest outing.

But what’s certain is that the tabloid’s claims couldn’t be possibly accurate. There’s no proof that Lopez doesn’t want to be friends with Garner’s boyfriend Miller because there’s a reason for her to hate him.

Garner and Miller have been dating for years. And Lopez and Garner’s relationship has also improved considerably in recent months. So, there’s no reason for Lopez to dislike Miller.

At the end of the day, Lopez should even be thrilled because there’s no bad blood between Miller and Affleck right now. This means that the two sets of couples have an amicable and peaceful relationship with one another.

It is also important to note that Lopez and Affleck are on good terms right now and that’s what matters. The couple just tied the knot months ago so it’s unlikely for them to be dealing with senseless issues this early on.