well a family permit is virtually a legal right to a EU citizens spouse so i wouldnt worry to much about it, but
EUN2.10 What if I suspect a marriage / civil partnership of convenience?
The definition of 'spouse' and 'civil partner' in the EEA Regulations does not include someone who has entered into a marriage / civil partnership of convenience.
When a marriage / civil partnership of convenience is suspected, the burden of proof is high and rests with the ECO. However, in these cases the ECO is entitled to interview the applicant. Factors to consider include:
an adverse immigration history;
doubts about the validity of documentation;
application follows soon after the marriage / civil partnership;
no previous evidence of the relationship.
The ECO should not consider the following cases as marriages / civil partnerships of convenience where:
there is a child of the relationship;
there is evidence to suggest cohabitation.
http://www.ukba.homeoffice.gov.uk/po...eun2/#header10