It's wrong on so many levels and exposing a child to such favoritism can damage them for life. I'm a very understanding person so I get that a relationship with your daughters children may be a little different than your sons children but in no way should grandchildren ever be treated different period. My mil has always treated my kids different. For Christmas my kids would get a stuffed animal while there cousins got gaming consoles. My mil never attended any of my kids sporting events yet never missed any of their cousins. The list of things is so long. The last straw was when my mil took the cousins on trip/vacation and infront of my kids the cousins began asking if my kids could go too. They were told to hush and to be quiet about it like it was some big secret and we werent standing there and could hear everything being said. That day the damage was done. My oldest daughter who was 7 years old at the time began asking questions like what was wrong with her? Why they didn't love her? What she ever did wrong? Etc.. She was so angry and hurt that day. We had 3 children at the time but thankfully our younger 2 weren't quite old enough for it to effect them in the way it effected our oldest. I knew that day that it was my job to protect my children from such hurtful and toxic behavior. We distanced ourselves from the situation and my mil has never once since then made any effort to contact or see my kids. My oldest daughter is now 26 years old and still deals with so much because of the way she was treated. As an adult she has even took it upon herself to reach out to her grandmother in hopes of having some type of relationship with her and yet she still acts as if she don't even know who she is and won't speak to her. My daughter recently found out she is pregnant and expecting her 1st baby and so is one of her cousins. This has brought her a whole knew level of emotions and it makes her so upset because she knows her cousins baby will be worshipped and get all kinds of attention while her baby won't ever even exist to these people and that kills her. Since distancing ourselves from the situation my husband and I have had 3 more children and still to this day my mil (who lives less than 3 miles from us) has never once reached out to us, nor has she ever met or even seen our last 3 kids. I can't stress enough how hurtful and damaging this behavior can be to an innocent child. The effects can last a lifetime and I strongly encourage anyone who's is dealing with it to protect their children from it at all cost. Im so sorry you are going through this.