Who was Kasia Lenhardt?

Leaked documents from January 25 — a week before Boateng publicly announced the couple's breakup — appear to show Kasia had agreed to an NDA. She had agreed not to share pictures, texts or emails she had exchanged with the footballer. Kasia also agreed to pay a penalty for 'each case of violation' of the NDA. Boateng had accused Kasia of sabotaging his relationship with ex-girlfriend Rebecca and his family before they started dating, and of blackmailing him into staying with her.