What was your real reason for you to tell her you didn't want her to go? Why didn't you give her a reason? I'd be annoyed too if my H said "because I said so".
I agree, it sounds very controlling. After reading the followup posts I'm still confused as to why you didn't want her to go. Because you felt she was "running away" from pressure (sex?) You've got to keep giving her time and space, you're not out of the woods yet. If she wants to go do something then let her, you don't own her. If you're upset about it then talk to her about why. Don't make demands.