Jaidyn Alexis says she got even with Blueface after learning he’d slept with one of her best friends … by sleeping with one of his — and she has zero regrets.

Jaidyn dropped the bomb while sitting down with our Towanda on “The TMZ Podcast” … explaining things between her and Blueface really started unraveling around the time he went to jail.

Jaidyn says the two had already separated before Blueface got locked up … and while he was behind bars, she says he decided another woman was going to be his “main bitch.”

From there, Jaidyn says things started snowballing … including finding out Blueface had hooked up with one of her best friends.

Her response — “I’ll go f*** yours then” … and Jaidyn says that’s exactly what she did.

When Towanda asked whether she knew what she was doing at the time, Jaidyn didn’t hesitate … saying, “Absolutely. I would do it again.”

Actually, she says she’d do it “better” next time … joking they should get a whole production involved.

Jaidyn says she didn’t necessarily expect the hookup to become public, but knew it was possible — and simply didn’t care.

As TMZ previously reported … Jaidyn has made it known there’s still plenty of bad blood between her and Blueface, recently telling us she doesn’t respect him because she doesn’t feel the respect is mutual.