Thank you everyone and I am so encouraged by the support from new posters, who followed my original threads, as well as from my existing friends. I think that it helps me to focus and get things into perspective by posting, as sometimes I just think maybe I have lost the plot.
My sister in law called me yesterday evening, returning a missed call from me earlier in the day. Actually, although I was aware that my 'phone had made a random FaceTime call, I hadn't realised that it was to her, and I am not sure why that would happen, as we hadn't spoken for about a month, so her details were not at the top of the list, if you see what I mean. I tend to think it is DH making it happen, as there have been other signs, and my 'phone also rang someone about two months ago, within a business context, and it turned out to be a really important and helpful conversation. Maybe I am mad, but it is comforting to think that he is still around.
Anyway, it seems that DD1 also rang my sister in law, who is lovely and exactly the sister I would have loved to have (I don't have any), to ask her about when the inheritance would be paid. Sister in law told her that brother in law was dealing with it as quickly as possible, but it all takes a long time, 45 minute waits on calling the authorities etc, but he is doing his best. This was about two weeks ago, but DD1 never mentioned it to me.
DD1 also apparently told sister in law that she was very upset that I had said that she had hurt Dad. It sounds as though sister in law was very tactful, said that we were all grieving, that it was complicated, that she needed to be realistic, would take a while to sort out, but that DH would want it to be sorted out. Apparently DD1 also told her how much she loved DH.
I had a long chat with sister in law - we have always got on really well, but became a lot closer after DH's illness and death. Apart from being genuinely lovely people, she and her brother strongly resemble DH, so it is comforting to see them. She was of the view that it was inevitable that my feelings would have come out sooner or later, as they always do, and that DD1 needs to realise this and can't just sweep things under the carpet.
Sister in law was very reassuring. Her view is that DD1 is young, she has obtained her qualification even if she isn't using it right now, and she has her babies and is able to spend time with them whilst they are little. Also, she is married, which gives her financial protection, even if she is married to the wrong person. I felt better after speaking to her, but a bit embarrassed that DD1 has been chasing people for the inheritance, when she has not bothered with them for years. Sister in law is DD1's godmother.
Elspeth - I assume that they can't claim benefits if they have a lot of capital, apart from child benefit. Since there seems to be a diminished demand for puppies, I don't know how they are proposing to earn a living.
Sssloou - I genuinely don't know what her agenda is but you are right, she expects my time and attention, despite everything, and still seems to be trying to justify her shitty behaviour, especially to herself.
Gh0st - I agree that it's odd that she should be sending me links to unsuitable properties. She said that they wanted to compare what you could get for your money in different parts of the country.
Hove - thank you so much for your supportive post. DD2 seems much more upbeat today and has actually resumed work on her PhD for the first time in a while, which is encouraging. We are hoping that DD3 will be able to join us for a Father's Day BBQ (subject to weather!).
rejected and Random and Wimpole - I think you are all right to say don't be drawn in. I only expressed an opinion because pushed. DD2's reaction to the whole situation is 'Meh' - if they want to live some Steinbeck style dream, let them get on with it, don't get involved or engage, especially regarding any financial discussions.
Immunity - I totally agree with you, and your post really resonates with me. It is the difference between having an authentic relationship and a non-authentic relationship. You didn't give up on your relationship with your mother, despite the challenges. I think that was brave of you.