As I was going thru all of Pam's papers I ran across these again. I thought that they maybe helpful to some. I don't have dates for these letters but I believe they were probably from earlier on. Pam was smart she was educated. She says she's independent. She tells him she won't be controlled. Little by little she lost those.  The home phone goes. The internet is password protected and Pam was only allowed access when Kevin was there. Then Kevin would just take Pam's phone and car keys. 

She was a prisoner in her own home.