Your breeders look great!
Give Nancy time. From the pictures I'm sure they're ready to spawn. Some females take a longer time for her eggs to be ready. So just be patient.
About Rio and Ada, don't rely on the bubble nest. You have seen the way Sid and Nancy swims. If Rio and Ada is swimming the same way, then they are ready to spawn. If not, then separate and isolate them.
Lets assume that they're ready. The question is, when to release the female. Less vicious males, like Sid, wouldn't harm the female. But some males will literally beat the life out of females. So what's Rio like? To be safe, give Ada at least 3 days in the jar.
If I haven't misinterpreted, do your bettas spawn at night? I have never had a betta spawn at night. I never use lights, so they become inactive after dark. My breeders begin to spawn between 7 - 10 Am and finish ..... when they're done.
I'm looking forward to pictures of the results. Good luck.