Thanks, Russell! :D
Anyways, Namialus, it's not that hard. Just state the facts. The bettas won't get stressed (after they settle down), they'll be active and have something to do, they won't hurt each other, and you get to have more than one fish! Plus, it's only 2 bettas in a 10. I've divided my 10g and had 4 bettas in it. At least you'll get to see them interact with each other. I just use type 7 mesh from Joann Fabrics and binder clips. The binder clips holds the mesh in place and the bettas can't push trough it. Yes, they can see each other, but my bettas will just flare a bit and swim really fast back and forth the length of the divider. But, they don't do this constantly. They'll do their own thing and you get to see every bit of personality from the bettas. Honestly, I prefer divided tanks (where the bettas can see each other) over just plain betta tanks. I do have a 10g with just a single betta in it, but that's because I also have an oto, 3 red cherry shrimp, and a whole bunch of plants that I'm trying to grow out in there.
100g Native Fish Pond, 55g Goldfish/Catfish Community, 50g Plant Pond, 40gB Tetra/Cory Community, 20gHM Community, 20gH Turtle (Bender [RES]), 20gL Turtle (Kif [YBS]), 15g Reef, 5.5g Betta (Okami), 5gFBH Betta (Pron), 5gHex Betta (Twister)
2 dogs, 13 cats, 2 turtles, 1 bearded dragon and 1 crested gecko