Speaking as a step mum, a bio mum and a mum who shares custody with an ex. I am coming from all sides when I say, that from now on for my family presents are got for the children who are waking up here xmas morning only! If they are at their other parents xmas morning then xmas is their responsibility.
Before you lose your mind, let me explain why... for years i have done it the other way....
My ex and i share xmas with my DD she has two full blown xmas days every year, one with each parent.
My husband shares 2 sons with his xwife, they also get two full blown xmas days each year, one with each parent. I'd also point out that my husband pays an enormous amount of maintence and whether people "agree" or not, legally maint does include a provision for xmas presents.
My husband and i then have 3 children together. Who get one xmas day! One! Not only that but every other year they have had to "postpone" their one xmas day to wait for the others, to come on boxing day.
My DD gets presents from me, her stepdad, her dad and his GF, thats 4 parents all buying her presents, double the amount and double the xmas.
Same with my stepsons!
My sons just have 2 parents, one xmas day, ultimately, its not "equal" when the kids who's parents are separated are getting far far more, than the kids who's parents are still together.
The older children are all also teens.
I've put my foot down this year as my 6 year old KNOW's when xmas day is, he's been asking echo to countdown every single day and he will know its xmas morning, but my step sons are with their mum and my daughter is with her dad for xmas day this year and not coming to us until late boxing day. they will definitely get a few small gifts, but that's it. They had their xmas with their other parent, they HAVE been spoilt rotten already.
A couple of years ago i was so upset when i realized that my step son, who turned up at our house in £180 pair of trainers, with dr dre beats headphones, talking about his new gaming laptop, with his freshly permed hair and designer gear went mental at my husband for treating his "step daughter better" because we'd got her a (second hand) xbox 1 and not got him something of the same value (as a brand new one).
At the end of the day the kids should be treated the same... one set getting two xmas' and double the amount of present from double the amount of parents while the other set of kids gets half.... is not treating them the same.
And as i have witnessed, it just makes for very spoilt and ungrateful kids.