So BIL (DHs brother) is splitting with his wife, his decision, very messy and painful for both of them, thirty years of marriage for them, we have all been close throughout this time. I have always been friendly with BILs wife, and we have been messaging more since the seperating. She is facing the bank holiday alone so I invited her over for the day. Mentioned it to DH who said it is wrong to socialise her and if he spends day with BILs now ex he is betraying his brother. Was I unreasonable to assume we could remain friendly with her?