I am only haveing 2 girls in BP, what are there correct titles?

Hi I am having my sister and my best friend in my wedding party. I know when one is married (my sis) she is the matron and when one isnt she is the maid of honor but since I am only having these two and it works out one is married on isnt i was going to call them maid and matron in program. My fiance tells me its either one or the other what is the correct way to phrase this?He says my sister would bve MOH and best friend would be bridesmaid.
Thanks.

No, No, No...you are completely CORRECT about the titles you provided. You can most certainly have two Maid of Honors. They will have a different title, but play the same role due to the fact that 'yes' one is married and will be known as a 'Matron' hense 'Marton of Honor'. The unmarried one will be the 'Maid of Honor'; over all both playing the same roll in your wedding and no bridemaids needed. That is just fine! So tell FH to do his research again...lol