In that window, to make it work for your husband and you and allow you to control the light, I would use wooden blinds that match the trim (and a shade lighter if you can't make it exact) with attractive tapes. I'd use very light-weight ones, and use the widest slats I could make fit, because it takes fewer of the wider ones per shade, which means that they stack up higher when you pull them all the way up. If that is appealing to you, from what I can see, you will need to add a header from which to hang them, so that they will clear the windows when open. That can be masked with molding stained to match. Some blinds have valances of molding available to match. And it also means measuring carefully from side to side, based on the spot at the top where they would hang, because every additional bit of distance out from the window means their width might have to be reduced a bit, so they will clear each other at the inside corners. (Am I making that part clear?) For the safety of your children, whatever treatment you choose, think about how to corral the cords so they can't get tangled in them.

gastroc, your window trim is very similar to ours. I love it! Though I've not used this type of rod on any of our windows yet I'm thinking about doing so in the guest bedroom just to show off the gorgeous trim. There are a few different styles but they all fit inside the trim leaving just a small little hole. The photos in the link below are not all Twist n Fit Rods, but you'll see the style in all the ones on the top row and here and there through out the rest of the page linked below... Here is a link that might be useful: Twist n Fit rods.

Hey There: Window Coverings and the design of the house must go together and furthermore you must keep the function in mind. In you case I do recommend to layer the window coverings... As I can see in your pictures, you might have a privacy problem if your don't close your coverings, but of course your don't want to sit all day in the dark. So as a first line of defense (literally spoken of course) you go with minimalistic pleated or honeycomb shades. They fit nicely into the window casing and operate bottom up and top down. This will give you privacy and light management and allow you to look outside and enjoy nature around your home. As the second layer you can opt for curtains to the side - either operable or just decorative. This combination is not to heavy to take over the rooms. Stay in lighter colors but don't match them...lighter for the blinds and a bit darker for the curtains. Good Luck with your project www.PleatedBlindsStore.com

Look at Houzz photos "roman shades on bay windows" and you will see a bounty of delightful window treatments for bay windows. It is assumed the space is a main living area, so the formality or casualness of fabric for romans would depend on the planned furnishings and décor for the room. Is this helpful?