Hell-o Samantha,
I don't see any need for marriage counciling, or
therapy. Everything between you and your wife
seems to be working just fine.

Your wife is obviously OK with your CD'ing, and
you're OK with your secret being exposed to
your daughter. So the real problem here is between
your wife and daughter (you're just caught in the middle).

How old is this daughter? Is there any way to
get her to move into her own place?
Even if you were to subsidize her rent, you'd not
only be helping yourself with some more "me" time,
but also helping her find her own independence.
I'm sure this will all work out for you eventually.
Much Love,
Kristyn