monthly photos?

I did the same thing and at Walmart. I will do the same thing with the next baby.

Use your own camera and take photos yourself. That way, you can choose his happiest times.

Do you have a camera? I do my daughters pictures at home. Once a month I get her all dressed up and take her "good" pictures and then throughout the month I take just pictures.

Heres what I did sometimes... I put up a sheet on my couch (or wherever) and took pictures with my digital camera. Then I picked the ones and ordered the prints from walmart.com. It was so much easier because I could choose which time of day she would be happiest and do them then. It was cheap too. Sometimes they even have specials on packages.
Chances are, your son wont remember when you did and didnt take him for pictures, so he couldnt be jealous of his sister.
You could also just take her in for the major pictures- 3, 6, 9, and 12 month photos, and do the rest at home.

I have just taken all my kids monthly photos my self. I get them dressed up nice and find a spot I think will be cute and nice to take a photo.

I don't know how people get $8 photos from Walmart (including my niece). They always charge me over $100.

Anyway, we didn't do every month, but this photography studio we go to has a Baby Plan that does a Mommy & Me (or Daddy & Me if you prefer) session, 3 months, 6 months, 9 months and 12 months. After that you can do a Watch Me Grow and you can choose 18 Months, 2 years, and 3 years, or 2, 3 & 4 (I chose 2, 3 & 4).