Dreaded family photos

Almost two years ago, my husband's siblings and their families took family photos together. We opted out even though they invited us to join. Reasons we did not participate: 1. We had a busy weekend when they had it scheduled. 2. I was having allergies to everything under the sun and my eyes look horrible at the time (and I couldn't wear eye make-up due to the terrible allergies...totally not cool for a professional family photo shoot). 3. We were the only ones without children and we thought it would look weird to just stick us in there.

Last Sunday, we found out that they are doing a photo session together again this fall. We were invited and my mother-in-law mentioned that the pictures from 2 years ago would be perfect if The Bee and I had been in them. We said we would do it this year as long as we don't have another commitment that day. Then my mother-in-law and one of my sisters-in-law asked me to think about color combinations that might look good for the outdoor, autumn shoot.

I obliged and posted some useful links on my sister-in-law's facebook wall. All three of his sisters and I have had kind of a running conversation under one of the links to share our opinions about what we think would look best. I suggested greys, whites, and a pop of yellow. My mother-in-law and 2 sisters-in-law liked that and they also like brown and orange. Then someone suggested that each family have a color. I am fine with that, even though they all have kids and we don't. I suggested that we choose a common neutral (i.e. blacks and greys) and then each family uses pops of their color in elements like shoes, headbands, sweaters, scarves, etc, so we all coordinate but there is connection between immediate family without being matchy-matchy or looking cheesy.  Everyone thought that sounded perfect and then my sister-in-law, who is due this month with her third child, commented

...or maybe the babies could wear the color?

Maybe it is me being overly sensitive, but (probably against my better judgement) I commented,

So, no family color then? And The Bee and I won't have any kids/babies yet in October.

I don't think that was too mean to point out, but The Bee isn't home to calm me down and I was thinking, "Really? Excluding us again?" And I don't even know what "the babies" means since there will be 2 teenagers, 3 toddlers, and 2 infants between the four couples at that point. So, 2 infants in color? Or 3 toddlers and 2 infants in color? Or 1 toddler and 2 infants in color (this option would be having the youngest in each of their families in color). And The Bee and I in black and grey. I think that would look stupid. Having 8 adults and 2 teens in black and grey and everyone under 4 years in color? Am I overreacting here?