Ramona had long known Tamera's character.
Tamera was always the tragic heroine in the story, the whole world owed her, she was always aloof and arrogant, and considered herself superior.
In a previous life, before she got engaged to Jermaine, Tamera had approached her and selflessly declared that Jermaine and her were the most compatible couple, and wished them a lifetime of happiness together.
Upon turning her head, Tamera cut her wrist at her engagement party with Jermaine, and deliberately leaked the news to Jermaine, causing him to abandon her and leave her as the laughingstock of the whole city.
If Tamera had really been aloof, she wouldn't have resorted to such a despicable trick to make Jermaine leave during the engagement party.
She never knew that Jermaine had a fiancée,
