Would u be happy about it? It might seem okay when u guys aren't married but if u guys are married,u then realize ur wife/ husband has a best friend who is of d opposite sex.
how would u feel, will u be uncomfortable or will u be relaxed about it?

First off,get this straight,there is no such thing as best opposite sex friends....No guy makes a girl his friend goes to bed without not thinking one or two things about her,I understand you would say platonic friends but f4ck it,if they don't like each other they wouldn't have common interest and goals to share or confide in each other and for the ladies remember a shoulder to cry on is a d1ck to ride on.