Unashamedly posting here, probably inappropriately, to get greater traffic.
Dsis and DBIL's best friends, X and Y, are splitting up after a long marriage (over 25 years). X has always been the main breadwinner, working in London through the week and coming home on weekends. Because of this, Y got a job in a local school when the kids came along (previous career would have been completely out of the question due to long hours, frequent business trips etc).
Several years ago, there were signs that X was having an affair – nothing major, just things like a work colleague phoning the house when Y was supposed to be out and being unable to account convincingly for needing to speak to X on a weekend. X naturally denied any wrongdoing.
Two years ago, when the youngest child went to university, X left Y and predictably turned out to have been shagging the above colleague, who was also married, for over six years. They've now both left their respective spouses and bought a house to renovate together.
The family home (no mortgage) has been on the market since the following spring, so about 18 months. X has continued to pay half the bills and council tax despite no longer living there. They've just had an offer of about 20% less than the asking price, which X is pushing Y to accept (desperately needing funds to chuck at the new house and keen to be rid of the millstone of paying expenses for family home). Y is not too happy about this, as 50% of the proceeds will just about buy a small house and leave almost nowt for a rainy day, and even less happy that if X had come clean at the start of the affair, they would have been selling at the top of the market and Y would have most likely had a small nest egg. Would Y be unreasonable to push for, say, a 55% share of the proceeds? Or would you just suck it up and move on?