Sorry, but I really don't see what's so wrong with Will. His brother and his wife had an affair, then they were going to run off with Will's son. I understand perfectly why Will hates his brother so much. I understand why he didn't want to give Ed any of the inheritance money he received.
Does anyone remember how lovely he was to Emma on their wedding day when she was dithering outside the church, thinking she was pregnant with Ed's baby. Will was really gentle with her and reassuring and prepared to call the wedding off if Emma wasn't sure.
Ed is a flake who is unable to cope with problems without going off the deep end. Emma does not help the situation by continually being bitchy about Nic.
Clarrie needs to stop trying to broker a reconciliation between her two sons. It's not going to happen.
Will should perhaps have a few counselling sessions to get rid of the last vestiges of bitterness over Ed 'n' Em, and set about enjoying life with Nic, the kids, the dogs.