i think sometimes you need to take charge and be upfront, if you think its going to look awful tell her so, if she listens and accepts it you can both come up with something better, but if she decides this is what she wants after you have expressed your concerns, then its her problem, you can only do so much and we are not miracle workers, and when you do them and they look like crap, she cant say you didnt warn her against it,surely she would pay for a mock up of one of the vases, how tight can she be,