We feel like they've already been together forever!

J.Lo and A-Rod partied the night away at the Met Gala in NYC on Monday, and the singer decided to slip into something a little more comfortable for the after party. It seemed a little warm for this coat, but she looked fab!

Jenny from the Block channeled her inner Fly Girl at the event, and was caught dancing up a storm as her baseball legend beau looked on. He better learn to boogie if he's going to be the future Mr. Jennifer Lopez, which it sounds like he is!

"She really wants to marry Alex by the end of the year. She doesn’t want to wait because she knows he’s her soul mate," a source dished to In Touch. "[J.Lo and A-Rod] have been talking about a prenuptial agreement. Jennifer not only wants to protect her money, she wants to make sure her kids [twins Max and Emme, 9] are taken care of. Alex is always on top of his finances, so a prenup is very important to him, too," the source added.

An engagement is for sure coming soon!

When a dancer always a dancer @jlo #metball

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