I am not convinced there is a scam. Could be, but the way she is behaving--she is as shocked as anyone that Monica left her the house. Yes. Martin has an axe to grind with Tracy, but you are forgetting that Alexis said the amendment to the will was done in January. Martin wasn't arrested until March.
It made sense to me that Martin and Ronnie acted like they didn't know each other because there is no reason to alert anyone that he reached out to her about her letter.
Tracy crashing on Lulu's couch is a joke. She's a wealthy woman. Why do that when there is another 5 star hotel in PC? The one Liesl is at.
The will may or may not have been a forgery, but I do not think Ronnie was involved in it because Monica was still alive to make the amendment. There are any number of reasons to explain why Ronnie will bounce for a bit. She does still have a life outside of NYC. Look at how long we went with Monica mentions and never saw her. They can easily fly ES back to film a bunch of scenes, hold them and then add them where needed. I do believe that once ES leaves, she will be back. But that's just my prediction.