TootsieFootsie said:
Did Russell or was Russell going to put in any of the money for the new place, if they had indeed planned to live there together.
Having been a Relationship Counsellor, I have found that many men often leave a marriage and because of possible guilt, just give the house to their former marriage partner and move in with their lover if the woman has a home in her own name. He then pays for the expenses, etc. However, that is usually when they still have children living at home. If Carol and Russell had decided to live the rest of their lives together, money would not necessarily have come into it unless Russell had been saving up and the wife suddenly noticed a large sum removed from a bank account and became suspicious.
Otherwise, the man usually moves out, lives with another woman as a separated man and proceeds to divorce where he would probably receive half the value of the house eventually causing his wife to have to move out, go on the pension and buy somewhere else and his children with less inheritance unless they have bought the property as Tenants in Common.
Another scenario is when a couple are "separated under the one roof" and live separate lives for years as seems to be the case here. That can be whether one partner has a new partner or not and they are both in agreement to having a divorce so it can be done more quickly as both have agreed.
But even if RH's wife did not want a divorce, Russell is free to leave his wife whether she agrees or not. I just think he might have been waiting for Carol to buy her new place first and he would then have made his move knowing that he would receive half the value of his marital home in the future and property settlement can be done before divorce.
I find it hard to believe that his wife would not have known about the possibility of RH leaving her soon if she had known about Carol for years and probably knew someone who kept her up-to-date with what was going on but, for all appearances, pretended she knew nothing. Wives often check their husband's mobile phone when the husband is not looking and find out many things there too.
In summary, I cannot see any other scenario that could be possible despite Boneman, accidents and so on. I believe in looking for motives. The wife would have the strongest motive.