Adele Sparks Marriage Rumors Again After Calling Rich Paul 'Husband'

Adele may be a married woman again -- at least that's what the Internet thinks, yet again, after she gave her boyfriend, Rich Paul, a very significant promotion in the title department.

The singer was doing her Vegas residency show Saturday, and per usual ... she was going around chopping it up with her audience, weaving in and out of rows of seats and interviewing folks on the spot Oprah-style. What else is new, right?

However, this time around -- a slip of the tongue appears to have befallen Adele ... 'cause when a female fan asked if she could marry her, Adele said she was already hitched.

Check it out -- Adele turns this woman's marriage proposal down in hilarious fashion ... saying she's straight, and not just that, but that her "husband" was in the crowd and probably wouldn't appreciate it. She didn't say Rich's name -- but he's the only dude she's seeing.

It's unclear if Adele simply misspoke here, or if she did actually say "I do" the famous basketball agent -- who reps the likes of LeBron James and tons of other NBA stars.

We do know that Adele has spoken glowingly of Rich Paul since they first got together a couple years ago. She's even gone so far as to say she's the happiest she's ever been in a relationship with him ... so, it's easy to see her walking down the aisle with him.

This is far from the first time people have speculated on where things are between Rich and Adele. There's already been a first wave of marriage rumors dating back to last September ... when eagle-eyed fans noticed a book at her house that a title of "The Pauls."