Question for FIL

It really depends on your relationship with her.
My DH is also an only child, and his mother MADE IT A POINT to be there when I tried on dresses, she was more emotional and ecstatic than my own mother. If you say it would make her feel good, I think its worth bringing her along :) Its her baby boy's wife, the new woman in life ! The future mother of her grandchildren. Definately give her the option to come !

Have fun shopping !

It definetly depends on your relationship with her. My FMIL came with me (she has all boys) and was very excited !! It would mean alot to her and she would be thrilled! I was just thinking about when my son gets married(he's 2!!LOLOL ) I WOULD LOVE TO GO!! I would be so excited to be involved especially with the bride. The woman my son loves!! Mothers of the grooms want to plan and be involved too. But do not want to step on toes. To have a relationship like that shows respect.
Maybe you can go with your Mom and Check out a couple and then take her along on the second trip to narrow it down . Good Luck Let us know what you decided.

I agree with Anna and SIL2mishy. Definitely give her the option to go, but be prepared that she may not be interested. Patrick has 3 sisters, all of whom were married in town hall ceremonies, with no dress, flowers, photographer, etc., so I though his mom might want to go along with me. I invited her 3 or 4 times, and it was always either a flat out no, or a 'we'll see ~ I may be busy that day'. I also invited her to my final fitting, and again, a no show. I was a bit hurt, but I had my own mom, sister and various friends with me at all appointments, so it wasn't like I lacked support. I just wanted to have a better relationship with MIL. The funny thing is now that we've been married over a year, she keeps trying to have a mom/daughter relationship with me (which I think is because 2 of her 3 daughters live out of state), and I have no interest, and don't feel close to her at all. I treat her with the utmost respect and don't dislike her AT ALL, but don't get any 'warm fuzzies' over her.
Oh boy did I ramble... sore subject, as you can tell!

I am an only child and I don't think I would insult my mother by bringing my mil that day.. Maybe when I go for a fitting I would ask her to come But I am not sure.

She doesn't strike me as the type to EVEN care!

My FMIL has only 2 sons and no daughters, so she would die if I didn't invite her. I really love her, so I don't mind at all. And my mom and grandma would love to have her there also! I think my FFIL would love to be there also. He says that he always wanted a daughter

I have a great future mother in law and she doesn't have a daughter so I asked her to come. She had a party or something that day and couldn't come with me and my mom. I found my dress that day and felt bad she wasn't with us. She's coming with me and my mom tonight for my first fitting. If you really love your FIL, I would ask her. It will make her so happy.