Gassed Up Lighties' Harlee has revealed in an emotionally charged social media post that her sister has been sleeping with her ex-girlfriend.

The south London singer said in a post on her insta stories that her heart was broken to a thousand pieces.

"I just want you all to know that my sister won. She can have my life... I don't want anything to do with anyone. I just want to be by myself. I don't want nothing", a sobbing Harlee said.

"The betrayal by my sister is disgusting. I don't' want anything to do with her. She really left me at court to go be with my ex GF", she added in a statement on her Instagram.

"How can my sister be laying down with the same girl that has her sister's name and her niece's name tattooed all over her?

Harlee then went on to reveal that the same lips her ex used on her period were the same lips her sister was pitting all over her face.

She also added screenshots of someone allegedly revealing her sister's affair in her DMs.

Responding to Harlee's claims, her sister Chryseis alleged that Harlee had "Multiple Personality Disorder" adding that she had an addiction to getting into blogs.

"She is the internet, I am reality", she said adding that she didn't even want to prove herself because she'd just keep lying.

Chryseis also offered Harlee a threesome with her man.

"Mehtap, link with me so we can have a three-way with me and my man fuck it", she wrote on her insta stories.

However, Harlee refused instead calling her evil and saying she was doing that just because she knew the truth, was confused and didn't know what to do.