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Megan Thee Stallion and Klay Thompson might've taken a major step in their relationship -- the popular couple appears to now be living together after the rapper's latest social media post.

Meg shared a photo dump on her IG on Wednesday ... giving her 32+ million followers a glimpse of her life lately.

The first pic has everyone talking ... as it features two hands coming together to form a heart with a set of keys -- and many believe one of the mitts belongs to Thompson.

That photo has fans convinced the couple has made a huge commitment by getting a home together ... and there was a ton of support in the comments.

"So where can I send a housewarming gift lol 😂," one fan said. Gallery Launch Gallery

Another pointed out her new single, "Lover Girl" ... in which Meg

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