This is extremely concerning op. Your friend needs to speak to the police for advice. A strongly worded solicitor’s letter may also help. Your friend may not want to stand up to him as she is living in his house. If this is the case, she needs to stop worrying about her housing situation as he can’t just throw her out. With or without a tenancy agreement, she has legal rights to stay and that would include even if she stops paying rent. The only way she can be forced to leave is by court eviction, which will easily lead her to the summertime.
As for her dd, how is she communicating with this man? Is it via text? Or is he communicating over Whatsapp, Snapchat and instagram? For her own protection, I think she should only be allowed to have the facility to text and not the apps. This is the only way you can block him / monitor if he is contacting her and what he is saying. With the apps, messages just disappear in Snapchat, WA he can delete them and Insta, he can see and copy photos of her, she has the ability to instagram live etc. Plus with Snapchat he can see her location.
With regard to monitoring her in general, I think your friend needs to have a look at her dd’s phone to check there isn’t any tracking on the phone with him linked. She and her older children should do the same just in case and remove him from any app, where he has the facility to track them.
This man is beyond creepy. Someone upthread said about possible hidden cameras. It would also be a good idea to check the house and if she finds any to not remove them but to go to the police.
If his behaviour starts to escalate and she intends to change areas, she should also be thinking she may need to change her dd’s surname to a known as for the new school. Or her own surname. The man has money by the sound of it and may not let them go quietly.
Idk if the control over your friend’s dd is about control over her as well. She is trying to get away from him and women and children are the least safe when trying to escape. She can contact Women’s Aid and if necessary find a space in a shelter.
This is giving me really creepy vibes. Men have been known to kill their own children so that ‘she can’t have her’. Someone mentioned Sarah’s law.