You should now be able to upload your pictures via the "message attachment" feature below the textbox. We are working on getting the verbage changed so it says "Picture Upload" instead.
Phoenix is adorable. I wanted to give you a heads up that in as little as a month she can get pregnant, and I can't remember if you ended up scheduling Shadow for neutering or not. But just be careful because even if it happens by accident (and it can happen in blink of an eye!), that it will not be good for her to be pregnant so young. So, I just want to make sure you and your mom are aware of the risks of putting them together. (IF you hadn't thought of that - you may have, I just wanted to make sure)
Also, remember the stuff that was driving you crazy with Shadow, Phoenix will be reaching her terrible teens soon too. And when that happens, it may actually cause Shadow's litterbox habits to worsen. Just know that this is all due ot hormones, and that it won't be forever. If you get them both altered, this should solve lots of those problems.