Back story to all this.
DH sister has always looked down her nose at us - they are well off (their own business) and they have brought their DC's to be spoiled brats. Life has always been good to them.
Then MIL became ill with Alzheimers and life started getting difficult for us all - we pitched in to help as much as we could around our small DC's and SIL did her bit too to be fair - sorting out the finances etc. SIL's kids were much older at the time - but kept their distance from MIL as she 'freaked them out'
MIL was never very close to SIL and her kids because of their 'stuck upness' preferrring to be closer to my kids and us as we are more down to earth. SIL was always very jealous of this and this resentment has obviously now festered as they are all extremely distant with us now and I suspect they feel hard done by doing things for MIL. (She is also very bitter about the loss of inheritance as care home fees are being paid). We only hear from them now if they tell us something about MIL (who is now in a home).
Anyway this week we have had an invitation to Nieces wedding but only in the evening - not in the day at all. We found out that they had got engaged via Facebook, also found out she was pregnant Via FB (we did send cards and gifts to baby so have tried to keep the contact going).
DH is hurt by this evening only invite - I'm thinking practically and glad we don't have to bother with outfits. It wouldnt bother me if we declined but in the interests of trying to avoid bad feeling maybe we should go - WWYD?