first if all apologies if im not posting in the right forum...But i kindly need advice on my situation
I am a stepchild to a retired German Stepfather who got married to my mother about 4 and half years ago (2010) and I recently joined them (Stepfather and Mother) on a family permit In Jan 2015. My Stepfather has lived in UK since 2004 and got his Permanent card in 2011 but he stopped working in 2012 because he became blind. Now my mother is due to Apply for Permanent Residence in few months along with mine.
So I did some reading on the processes because i wasn't sure on the type of form i will quantify under.
1. Since my Stepfather is retired now and my their marriage has lasted almost 5years, should apply for permanent residence as direct family member when my mother is apply her's too Or apply residence permit and still have to wait till after 5years

Because i read on the UK, EU regulations guidelines and it stated sometimes family members wont have to wait 5years in certain circumstances