So much for not waking him up

[Maybo]

I comb the entire house and even look out on the porch and in the backyard before I race back up the stairs to my bedroom.
"Jason!"
So much for not waking him up. But our son is missing.

Source: The Perfect Son by Freida McFadden

Does "So much for not waking him up" mean "the speaker doesn't want to wake Jason up very much but she has to"?

 

[Tarheel]

Jason is her husband, right? She wasn't going to wake him up, but their son is missing.

 

[emsr2d2]

It suggests that at some point previously, she had had a reason to decide not to wake him up or had actually told him she wouldn't wake him up. The use of "so much for" means that her action is going against a previously agreed/decided/promised course of action.

 

[Tarheel]

Note that "very much" doesn't work there at all. You either wake somebody up or you don't.

 

[emsr2d2]

Note that "very much" doesn't work there at all. You either wake somebody up or you don't.

I believe the "very much" was linked to "want", not "wake up".

 

[Matthew Wai]

So much for not waking him up. But our son is missing.

There is so much reason for not waking him up, but our son is missing, so the reason has become unimportant.

 

[5jj]

There is so much reason for not waking him up,

That is not suggested.