the fault largely lies with the fiancee. He (and his family) are arrogant jerks; plus he never liked Frederica anyway because she's not his type (he hates busty, curvy girls). In fact Julia entered the fray because she knew the fiancee was an awful person and was trying to save Frederica by enticing him away...problem is it worked too well because the fiancee loves petite, flatchested girls...