This is on behalf of my sister. She got divorced from her H (xBIL) nearly 4 years ago. He left her for OW. OW was also married and both couples have two DC. OW is from another country where her parents still live and OW and xBIL left UK to live there about three years ago.
Meanwhile, DSis got together with OW's H . The 4 children all get along so well that every long school holiday the children take it turns to travel to stay with their own Dad so all 4 of them spend the holidays together.
So far so good. A year ago DSis's DP lost his job and DSis had to ask for some help from xBIL which she got. Because of this OW said she wanted noney off her xH too...as my sis explained (very slowly) her xH was not working!
OW & xBIL have now asked for maintenance from DSis's DP. They are living in an expensive country and OW doesn't work.
DSis has tried to explain that if her DP has to pay maintenance then she will be forced to ask for maintenance too - they have recently got a mortgage together and DP tries to save every penny in order to pay for flights to see his DC who he never wanted taken away in the first place. DSis has been accused of copying .
If they go ahead with both claiming how would this work in practice?