honestly i wish it was the case that mil gets along really well with SIL but its untrue!! They fight like cats and dogs!! I have no idea why she does it all i know that there is no excuse for her behaviour and if she really did feel closer to her kids then ours, it is definitly wrong to let it show especially since the kids notice it as well as us!!!!!! For Example she took sil kids to her christmas party as santa was going to be there and give them gifts etc etc and did not ask our kids to go!!!! We were all at sil house when she went and picked them up!!! My DS asked two years ago if she would go to his kindy so he could show her where he goes as he loved kindy and she NEVER went!!!! Although she goes to sil kids school to watch performances etc whenever tehy ask!!!! I sound like a real whinging old cow but she just gets to me !!! And when the kids see it as well it must be bad!!!!

Thanks for everyone opinions!!!!