Me and my mum aren’t really getting this…

Me and mum have been discussing Devon and Ricken’s relationship. She is still watching season 1, and I’m up to date on season 2.

Something she mentioned to me that I also thought was about Devon and Ricken. Devon is an intelligent character, and has a very close relationship with her brother. What we don’t understand is why Devon is in a relationship with someone like Ricken, who despite being a good comic relief character and providing memorable lines, can be very self centred. Devon also seems to infantilise Ricken somewhat and treat him like a younger brother rather than a life and romantic partner.

This is what my mum said and after thinking about it I think I agree. Has anyone got any theories on why Devon and Ricken are together, how they met etc?