The rumor mill is buzzing with reports that Offset got his wife Cardi B pregnant again.

Offset and Cardi, who have been married now for a little under 2 years - have a daughter Kulture together. Now word is that Cardi's expecting baby number 2.

People close to Cardi have been speculating for weeks that Cardi B is pregnant. There were rumors in her inner circle that she's been laying low on social media recently, because she didn't want fans to notice her growing belly.

But Cardi's been keeping the rationale for her recent seclusion a secret, even from her closest friends.

MTO News was unable to confirm independently the pregnancy rumors - but last night we came one step closer to it. 

Last night Cardi showed up to the first night of her Las Vegas residency - wearing an outfit that completely hid her mid-section. There's rampant speculation on social media now that Cardi's pregnant.

Cardi performed at club Kaos at the Palms hotel in front of a sold out crowd. And instead of wearing her usual scantily clad outfits - she was entirely covered up.

Here's what Cardi wore last night at her Vegas show:

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Here are some more pics:

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In case you forgot - this is how Cardi usually dresses at her concerts:

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Cardi

Earlier in the day, Page Six spies say that the “Invasion of Privacy” star was spotted walking through the middle of the packed casino Saturday evening in “a pair of fluffy slippers and a dressing gown.”

Apparently she was on her way back from the spa.

We’re told the sight caused quite a scene, with excited fans calling out her name as she passed through with her bodyguards.