by the way, she was actually not aggresive at all with the male. She hid and ran from him. He was the really aggresive one.
I've never actually bred bettas, however from what I have heard and read, it can take A LOT longer than only two hours. In most cases, the female acts cowardly around the male. Was she timid when in the container in the 10 gallon? Did the male show any interest in her while she was in this container?
From some breeder websites I've seen, most of them actually said that "the female will usually be pretty beat up by the time the actual breeding happens". This is pretty much why I've refrained from betta breeding. Anyways, good luck. Maybe you should try again.
Also, make sure you have no water movement at the surface. Your sponge filter might be moving the water to mutch. Bettas breed in stagnant pools so even if you do get them to spawn, any surface agitation will break up the bubble nest or cause the eggs to fall. I had success with a Tomm's mini, placed at the bottom of the tank.
Keep doing what your doing for a few more days. Keep them together for longer though, about 3-4 hours. Watch them and make sure she doesnt get too beat up. If it fails again after the fourth day then you could wait another month maybe and condition again. But your better off trying another pair or different female with him. Not all betta's pair well.
Give her plenty of plants and pvc tubes to hide in. She'll be fine. You don't have to watch all the time. You'll be surprise o wake up to a bubblenest full of eggs one morning.
When she's not plump, you can take her out.
Usually they say leave them in a max of 3 days together. The male chases the female at first, then he tries to lure her over to the nest. Eventually she will come over to look at the nest he has built, she may not like it and try to tear it apart, he will chase her away from it. They do this for awhile and at some point when she is ready she will come to him under the nest with her head down, this means she is ready. They dance for a while underneath the nest and then he tries to wrap her. Keeping the fry alive is the hardest part, you need to do a ton of research about that. They need tiny little live foods at first.
Expect some torn fins, on both sides. That's normal for spawning.
As long as she has tons of hiding places in the 10gal, if it looks like they're both ready, I'd leave them together. You don't need to watch the tank constantly, but you do need to keep an eye on things. Remove one or the other if it looks like one is really taking a beating, to the point they're missing scales and constantly cowering in a corner somewhere with really dark colors.
Don't worry about the bubble nest, the male has plenty of time during spawning to add to it.