This weekend my partner and I are going on a Friday-Monday trip with his sister and family. In April we are going on a 2-day trip to do with a charity she does a lot of fund raising for. At the end of April we're taking his mum to meet up with SIL for a long weekend in Scotland. Partner gas just text me asking if I want to go on another weekend with them all in May. I really don't want to use any more of my holiday allowance going on another trip with his sister, I'd rather use it for a trip for just us 2 and the dog. He's now sulking as I've said I don't want to go on another trip with them.