My DP brother has been seing this lovely girl (although not officially dating due to his decision they are sleeping together and she has met the family) and i know that he is also seeing other woman although i havent met them, it makes me feel so awkward as i want to tell her as i would want to know if i was in that position but don't want to be classed as the stirring interfering type, as i get on with his family.This weekend we went away as a family and on the last day he invited this girl down to visit she drove 3 hours to visit him and i felt he was just using her as a dial a sh*g for want of a better way of putting it, he had seen other women a couple of days before!! what should i do?