Richard Simmons’ family is fuming over Pauly Shore trying to cast doubt on the authenticity of the late fitness guru's most recent posts ... and they're coming out swinging.
RS' team dropped a statement from his brother Lenny on X Wednesday -- clearing things up, writing ... "Dicky absolutely wrote his own posts. He worked on them a week in advance, going over and over them to get the right message."
Lenny added Richard would usually show his posts to him and his wife Cathy before they went live.