Another theme might be redemption or growth. Maybe Deku, through his relationship with Bakugo's mom, helps Bakugo to grow and change his attitude towards Deku. It could also show Deku's growth as he navigates a relationship with an older family member of someone he has a complex relationship with already.
I'm not sure about specific 'deku x bakugo mom fanfic' offhand. However, you can try searching on popular fanfiction websites like Archive of Our Own. There you might find various works related to this pairing. Just use the search bar and type in 'deku x bakugo mom' and browse through the results.
Another theme could be growth. Deku is constantly growing as a character. In these fan fictions, his relationship with Bakugo's mom might contribute to his emotional or personal growth. Maybe she offers him advice or support that he doesn't get from other characters. And also, there could be themes of unexpected relationships. It's an unusual pairing, so exploring how such a relationship forms and what it means for the characters involved is likely to be a theme.
I haven't read any 'Deku x Bakugo Mom' fan fictions myself. However, you might want to check out some popular fan fiction forums. There, fans often share and recommend their favorite stories. You can also look for tags related to these characters on the fan fiction platforms to narrow down your search.
Yes, it might. Reading romance novels could potentially make Bakugo more empathetic. He may pick up on the emotional nuances in relationships from the stories, which could then seep into his interactions with others, making him more understanding at times.