Just remember, when it does come time to tell your D6, Don't let W sweep it under the rug saying something like this was a mutual decision.
D6 is old enough that she can understand some of those things. If it is a one-way D, make a stand and tell W that she needs to tell D6 that it is HER that wants the D.
sounds rough, but maybe it would be enough to make her reconsider.