Name changed because the situation may be recognisable.
It's an in law one. I am going to keep it brief.
My father and step mother in law buy birthday gifts for every family member, including in laws, except my sister in law (husband brothers wife).
This has been the case, apparently, for the full 13 years they have been together. Subsequent to this for the last 6/7 years or so SIL and her husband (also the step son of MIL) have not acknowledged MILs birthday. I didn't even know this was the case until last month when for some reason it became a topic of hot debate between the rest of the family (4 children in all two of which are MILs). Everybody agrees the version of events that SIL birthday was never acknowledged, then BIL and SIL stopped acknowledging MILs even though they used to.
My feelings are thus- It's a unfair that FIL gets off scot-free just because he is the type of man that doesn't ever think of birthdays and leaves it all to the wife but other than that -shrug-.
Apparently my feelings are not strong enough and I should be condemning BIL and SIL and going NC at the very least (this wouldn't be a great stretch as we don't see much of any of them). Nobody else seems to give a shit about the one part I do which is why FIL isn't being held to account as well. DH couldn't care less and is just nodding at everybody involved. I am on the verge of telling them all to go and fuck themselves as they keep fucking mithering me about it despite never giving a toss about my opinion on anything else ever. The "they" is the rest of the family, SIL has had one conversation with me about it and then gone back to being pleasantly disengaged, which is how I like it.
AIBU to think that if this has gone on for over half a decade then everybody should stop speaking to me about it leave well enough alone?