Allred is representing the unidentified girl, who was mentioned in an OK! story, published last week, which said Kylie had busted her BF texting the 14-year-old. Allred says the story made it seem like the teen was excited to be part of "an alleged sex scandal."
Allred claims OK! portrayed the teen in a "false light."
No mention of a lawsuit yet ... but Gloria, the girl and her mother will hold a news conference Monday afternoon to tell their side of the story -- and we'll have it for you on a livestream.