Here is the rephrase I hope you can check. Thank you very much in advance.
1) Mr. B refers briefly to the incident in the summer house. He excuses himself by saying that on that occasion he didn’t want to do her any harm but be a little kind to her.
2) He scolds her for having compromised (ruined) his reputation. In her turn she confesses that she has hardly talked to anyone about that.
3) When he accuses her of having told Mrs Jervis about the incident she replies that her heart was almost broken and that she didn’t “open her mouth” to anyone else.
4) He goes on to accuse her of having "written about it" to her parents. She excuses herself again for having broken her mind freely to her parents and asked them for advice. He scolds her again and calls her saucebox as she has exposed him in his own house.
5) She begs him not to be angry with her but he walks into the great chamber two or three times leaving her on her knees. She throws her apron over her face and lays her head on a chair. She then breaks down in tears.
Here's the rephrased version:
1) In reference to the incident at the summer house, Mr. B briefly mentions it and justifies his actions by stating that he had no intention of harming the woman, but rather wanted to show her a small act of kindness.
2) Mr. B scolds her for damaging his reputation. In response, she admits that she hasn't really spoken to anyone about it.
3) When he accuses her of telling Mrs. Jervis about the incident, she defends herself by stating that she was heartbroken and didn't share the information with anyone else.
4) He further accuses her of writing to her parents about it. She apologizes for expressing her thoughts freely to her parents and seeking their advice. He scolds her again and calls her a "saucebox" for exposing him in his own home.
5) She pleads with him not to be angry, but he repeatedly leaves the room, leaving her on her knees. She covers her face with her apron and rests her head on a chair, eventually breaking down in tears.