For anyone that is interested, I was able to get back to having the two youngest siblings enter into a relationship. I'm not sure all of the choices I needed were but what it seems to have been was, I needed to call and meet Alina for help to "break the ice" with rachel. I bought her flowers, tickets and a sexy outfit. Then I met and proposed the polyamory with her first, then I got the option to suggest it to Bella.