A little bit of a backstory! This will out me but i'm due a namechange soon anyway.... 
My grandmother (df's mum) is in her mid eighties. She has always been a tough cookie but in the last few years has become very difficult. She has said numerous insensitive things to me and other family members in the past, and is utterly, unbelievably horrible to my lovely gf who has been a loving husband to her for the past 55 years or so. I have distanced myself from her over the last year as whenever I saw her I would leave upset. My sister hasn't seen her for years for this reason.
Next Sunday it is my 30th birthday. My football team are playing on tv and I would love to watch it with df. Football has always been 'our thing' and I have been going to watch our team play with him since I was a little girl. Df sent me a message earlier asking if he and dsm could come over to watch the game with me, dh and dd on Sunday. Fab, I thought, will be a little family gathering on my birthday, so I replies yes. He then messaged me asking if he can bring gm. At this point I called him and said that I would rather not as it's my birthday and I would be on edge the whole time, worried that she'd be nasty. My df said that in that case, he and dsm can't come over as they had already told gm that she could come over to mine with them - he said that they can come over by themselves earlier in the morning.
I've never been that big on birthdays but this is my 30th, and I have been very close to my df since my dd was born last year - so watching the football with him is a bigger deal to me that it sounds. I'm not sobbing into my coffee or anything, but AIBU to feel a bit hurt?