Ya if she loves the tapestry and it's her place it's her choice, and all that can be done is key off the colors in the tapestry to decorate the rest of the room.

Is budget a big issue? In other words, is this room a mish-mash of freebies or stuff that she already had packed away somewhere? If so, then maybe offer to contribute inexpensive things with their own soothing quality, that go (as best they can) with the things already there. Wind chimes, a small fountain, fresh flowers or a blooming plant (with a gro-light if necessary, leave the light on at night so the plant egets enough light to bloom).

I really like the idea of offering her books or magazines with a Decorating for Tranquility theme or Fung Shei, but do it in a non-confrontational way - "Hey, I was in the store, saw this, and thought about the Relaxation Room." If she's open to conversation right then, talk about it, ask her why she has the things she has in there, what she likes, what she doesn't like. You might be surprised at her answers.