In laws!!

I have nothing against my MIL when it’s just us without the children around but when the children are present that’s when she gets my back up! Family gatherings she’s always nabbing the little ones off at any given moment as if there some kind of trophy! Me and my partner won’t have a clue where our children are because she’s to busy prancing around with them but makes no effort with us. Same for her partner (my partners stepdad) he makes no effort to speak to me whatsoever but when it comes to the children it’s ‘ grandad this ‘ grandad that’ and it actually makes my blood boil! You ain’t even there grandad!! Mil and her partner have an awful jealously streak about them.. if we was to spend time with others it gets there backs up and they can’t stand it! When they see the children all they do is boost to others as if it’s some kind of competition! Angers me so much! We had an after party today with my partners family and we was grabbing a bite to eat with the children from the venue and before I knew it my MIL sat down our youngest who is two and sat him down on her table leaving me my partner and our daughter no where to sit so we had to sit on another table!! I mean seriously? Then she has the nerve to make digs on what we’ve served him up to eat.. go away!! We have a Santa’s grotto morning coming up with them both (already paid) and I can honestly say I’m absolutely dreading it!! Why do in laws think they have the given right with our little ones to just do as they wish? Then they wonder why we back off and they don’t get to see the grandchildren.. Sorry if I’m sounding dramatic or offending anybody but there’s a lot more that goes on x