Have posted before about family issues, problems mainly with DM (and in the past with dsis)
I get on well with dsis now, she has made huge efforts to help me with my dcs lately, even learning how to care for dd2 (she has an insulin pump due to diabetes) and is the only family member so far to show any interest in helping with dd2. Things are improving greatly and the dcs really like her.
DM can still be very 'difficult' and would be best described as 'toxic'. She is very self centred and can be hateful but swings between hateful and all powerful to suddenly being frail and vulnerable when it suits her or a completely different person if anybody outside of our family is there and then she makes out that she is never in the wrong/is a nice person etcetc .
We have been thinking about asking dsis and her dp round at Christmas for the day, they always make a huge effort with the dcs and growing up we never had people round so it would be nice I think to have a bit more of a normal and sociable Christmas.
However, I know if I also invite DM it will change the dynamics of the day completely. She seems to bring an atmosphere with her wherever she goes, and it will I think make things uncomfortable, she also will be doing her vulnerable act and dh will have to pick her up/drop her back etc and then he will not be able to have a drink with Christmas dinner. DM and dsis don't really get on at all anymore so it could potentially end up with an argument too which I don't want dcs to witness.
I do feel bad though as I know if I don't invite her she will be alone all day and there is no other family nearby so I feel if I don't ask her I will look awful (and she will make sure she tells everyone what I've done excluding her).
In previous years we have gone to her her house on Boxing Day (the last time was 2012) but it was unbearable, she invited everyone but then proceeded to be angry that she was having to cook whilst everybody was playing with dcs etc, we did offer to help but then she got all annoyed we were not doing things how she would and she ran the day to such a tight schedule that it wasn't actually any fun and the dcs played up a bit. Dd2 was also very ill that year so it was stressful anyway and we decided we wouldn't go to her again at Christmas.
Dh thinks I should ask her anyway as she will say no (in his opinion as she doesn't like going far from her house/eating at other people's houses) but I know DM better than that and she will probably accept purely because she will assume if she's not here she will "miss out" then will quiz me for weeks afterwards as to was everybody talking about her etc etc, she hates me and dsis getting along too and whenever she is with us and we chat she does everything she can to call one of us away then gets tearful that she's not part of anything when usually we are only talking about the dcs or some other subject and not about her!
I just don't know what to do. I know with dsis and her dp we could have a fun day, the dcs will be happy etc but with DM there too there will be an atmosphere. On the other hand I can see how rude and uncaring it will look if I don't invite her as well. I don't know what to do?
WIBU to not invite her or should I just put up with her this year and try to make the best of things ?