This is going to be a bit of a vent, in addition to a legitimate question, so bear with me.

We are having family pictures done with DH's whole family this summer. It has been more than ten years since DH and his siblings, plus their families, were all together, so it's a bit of a big deal. We're spread out across three continents so the opportunities for us all to get together at the same time are few and far between.

DH's SIL (not a sibling, it's the wife of his brother) is a bit of a control freak and is trying to micromanage what everyone wears. I understand the need to sort of coordinate but I'm really resistant to being told we all need to wear white and navy/denim, with emerald green accents. I think that sounds too matchy matchy, which I absolutely abhor in family photos! I far prefer people just dressing nicely, nothing garish or loud, keeping it to somewhat neutral tones for the adults, dressing kids in cute outfits, and letting individual personalities shine through.

Am I overthinking this? I've seen SIL's idea of 'coordinated' family photos as they do them several times a year, and it is way too matchy for my taste (eg this summer they did lime green, blue, and white with SIL wearing a blue dress, BIL wearing a lime green shirt and white shorts, one child wearing a lime green and white outfit with blue trim, and the other child wearing a blue shirt with lime green shorts). I suggested we do neutrals for the adults with the kids just being dressed cute, but the response to that was my SIL is happy to buy the clothes for all the kids and let the parents coordinate from there. Nice gesture and all but her idea of style for kids clothing is so completely opposite of mine (I'm very Carter's, Next, and Gymboree, she's very Zulily with ruffles, flounces, and lots of monograms) that there is no way that is going to happen.

So basically, this long, rambling post is just to ask how coordinated you go when planning family photos. Is SIL being a bit over the top with her micromanaging or am I unrealistic in my expectations? What do you consider to be the difference between coordinating and being too matchy?

Just for information, there will be 18 people in this photo and I will be about 3-4 weeks postpartum with baby #3 when the photos are taken.