Here is the second part of the rephrase. Thank you very much, Writeacher!
1) Mr. B. charges her with overreacting and, by way of giving her some more substantial grounds for anguish, invites her to sit on his knee. As a matter of fact, Mr B attempts to her taking advantage of his physical superiority.
2) He offers to kiss her neck, alludes to her as Lucretia- an allusion with which Pamela is familiar, then fondles her.
3) (According to ancient Roman legend, Lucretia was a beautiful woman who refused to yield to the advances of Tarquin, the lustful son of a king. So he took her by force.)
4) Then the actions become more violent and are not accompanied by words. She runs away into the next room, shut the door closed behind her but Mr B has already got hold of her dress, which is torn off and hangs from the closed door.
5) Meanwhile, immediately after she has escaped into the next room, Pamela faints. When she comes to, Mrs. Jervis is at her side. Apparently, after she fainted, the squire looked through the keyhole, saw her lying on the floor, summoned Mrs. Jervis, and broke open the door.
1. one comma needed
2. replace second comma with dash (to correctly end the phrasing after the first dash)
4. ... shuts the door behind her, but ... from the closet door.