This is one of my all-time favorite romantic comedies with one of my all-time favorite actresses (Gabrielle Union). If I had been born first instead of last I'm sure I would have *been* Eva. The IMDB summary says "Eva Dandridge is a very uptight young woman who constantly meddles in the affairs of her sisters and their husbands." That is putting it quite mildly.
Eva is so meddlesome that she is driving her sisters' men (one husband, one fiance) over the edge and they know they need to find a way to distract her. Her sisters don't quite understand how dysfunctional her influence is because she practically raised them and they think of her as just being herself. Sweet, funny movie that will resonate with anyone from a dysfunctional family - which I assume is pretty much everyone.
You can watch it on Amazon Instant right now for $2.99