Richard does have a point here. He reminded Elizabeth that when he, Edward, and George killed Henry VI they publicly displayed his body to show the country that his line had ended. So if he were responsible for the Princes' deaths he'd have done the same thing.
Ohhh, so here's where Lizzie meets her dear Richard.
And so it begins. He's already taken with her.
Elizabeth and Lizzie just said that they would curse whomever killed the Princes, but Richard reminds them to take care, because their curses last too long and could harm someone they love.
He's made another good point.
Is that Anne making confession? She suspects that she might've influenced the deaths of the Princes.