I have a heavily planted 20 gal divided tank with my male on one side and my female on the other. I went out of town a week ago and just came back today... and was shocked to find my female on my male side

poor girl was hiding deep in the plants. My boyfriend insist he did nothing so maybe she jumped the divider?? After I mover her to her side I noticed in my male was staying in the corner next to a bubble nest. When I looked closer there were little white things dropping from the nest and swimming back up. I can't believe my bettas even survived! My female is big and aggressive while my male is kind of small and non aggressive. I am pretty new to betta keeping and haven't owned any other fish before these... So I have NO CLUE what I should do! DDD: