Rocking the mother-in-law's pearls

Dear ESB,

Here's my dilemma: my future mother in law has asked me to wear a pearl necklace to my wedding that has sentimental value to her. Here is a link to the David's Bridal dress I'll be wearing. On my curvy figure the dress comes across as a little more sexy than it does on the model in the picture. The pearls are small, single strand and fall just below the collar bone. I think the necklace and dress look perfectly fine together and I want to wear it since it seems to mean a lot to her. But the look is very simple and classic and doesn't really feel like my style. I've been thinking about layering a few necklaces together, but I'm worried that it might offend her if I wear more than one necklace. Also I'm wearing my hair down and I wonder if a bunch of necklaces, plus lots of hair, plus a sparkly dress is going to be too much? I actually don't usually wear much jewelry.

I've known her five years now and we are fairly close. I could talk to her about it but I feel like she's the type of person who would say it was ok when she was actually upset about it (or completely misunderstand my intent), so I'd like to have a better idea of what I want to do before I bring it up. If I do decide to wear more than one necklace when is the right time to tell her? I might feel kind of funny just showing up to the wedding like that without mentioning it first.

*****

According to the Allure I picked up at the salon the other day, "A single strand of pearls is dated; a bold necklace of imperfectly knotted ones is strong and stunning."

But you knew that already.

Just tell your FMIL that you've decided to go a little nuts with the necklaces. This is your big day to be sparkly! Surely she won't begrudge you that.

p.s. Will someone please get married in this Vera Wang bustier?