The decision must be based on his person judgment of Maggie, and this made it doubly difficult.
I'm afraid it's going to make your job doubly difficult.
A series of broken promises makes current peace talks doubly difficult.
Oh, how doubly difficult it was for them both.
If you had to relearn a lesson it was made doubly difficult.
The task was made doubly difficult, they said, in the crush of passengers at Christmas time.
"The horse can smell the girl and thus is doubly difficult to lose."
That makes it doubly difficult to get out of here.
If you don't see the whole picture, then the rest of it will be doubly difficult to understand.