What do you think of this situation? Me and my boyfriend have been together for about 6 months and everything is going great until recently, we had a day off coming up together which we rarley ever got due to work, so we planned a day out and as we needed to pick something up from IKEA on the way back we planned it around that, however boyfriend's sister suddenly needed a repair at her flat, but the day the repairman could come, our day off, she had to work and didn't want to rearrange, so she asked my boyfriend if he could go to her's, an hour and a half away from us, and let the repairman in, we decided yes okay we will do her a big favour and cancel most of the plans for the day to help her out and found an IKEA on the way back and chose a restaurant on the way back from her's also to go to, all was good, however boyfriend casually mentioned to her we were both going and she immediately said no, she wanted to be their the first time I visited her house, (I want to add ive met her in person a few times before at family dinners already) and obviously on this occasion wasn't really possible as she was working, so he explained to her if I didn't go we'd have to cancel all our plans we'd made, so she said right okay then she can come then, but then afterwards, despite being a women in her 30s, went straight to calling her dad and complaining to him, his dad was annoyed at boyfriend for disrespecting his sister's wishes and his mum asked to speak to me in person, so I calmly spoke to her and told her I couldn't understand why she would have such a problem with me going when we were doing her a favour and cancelling a day out together, and if we didn't both go we'd have to cancel the entire day, I also said if I ever asked my brother to do me a favour I wouldn't then say, but actually your girlfriend can't come with you, just cancel all your plans, to which his mum responded, 'wow your such an angel arnt you' sarcastically, then said 'I won't have you bully my son into taking you when my daughter doesn't want you there, you've never been to her house before, you can't go until she wants you to go', so she made up that I was bullying him on the spot, when I tried to tell her that wasn't what was happening here she then said ' don't you talk when I'm talking young lady this is my house', then insisted my boyfriend go alone and I go home, so my boyfriend went by himself and I just don't know what to make of this situation that surely shouldn't have been a big deal? AIBU?