Perez Hilton‘s sister is speaking out about the moment last week when she found her celebrity blogger brother in the bathroom of his Miami home covered in blood after cutting himself repeatedly while streaming the self-harm and possible suicide attempt live online. “Aug. 4 will forever be one of the darkest days my family and I have ever experienced,” Barbara Lavandeira, the sister of the star blogger, whose real name is Mario Armando Lavandeira Jr., told Page Six this week. Lavandeira is referring to the date that her older brother was found livestreaming himself on TikTok from his home, making suicidal threats and using an object to…