First single-handing

Seriously, docking is the scariest thing you can do at one mile per hour IMHO. I would be scared-excited to be single handing our boat in 25 knots of wind and a chop. I am scared-unhappy docking in a tight/awkward spot in 5 knots. That said, I'm getting better at it and I keep doing it because I'm stubborn and a perfectionist.

Our method right now is for the captain to talk through each docking to the deck monkey (as we call that role) including a brief on what we expect the wind to do to us. The deck monkey's job is to provide honest feedback on the plan. Of course, the wind may change in the marina and the captain may have to alter. This way though, both people are learning about docking by talking through the conditions even when they are the deck monkey.

Perhaps you could start by keeping her as deck monkey but asking her to talk you through a plan. Then maybe next step could be to ask a third person to come aboard as a deck monkey and you (after talking through a plan with her) guide her through the docking (her on the wheel, you talking).

Everyone's relationships are different but in my limited experience I see a lot of couples punishing the behaviors they want in the other person and rewarding the behaviors they don't want. Doesn't make a lot of sense when you think it through - basic learning theory right?

When she docked the boat, after you fended off and tied lines, did you smile a huge smile, yell "WOOHOO!" and go give her a big hug and tell her how proud of her you were for trying? and how any docking where everyone is alive and the boat is hole-free is a success? and emphasize what she did right? and then later, when the adrenaline went down, did you ask her if she wanted any suggestions (and if she says "no" or "not right now" you let it be)?

Or did you get a panicked look on your face, yell something directive, then immediately get on your knees to see if she scratched the hull and finally ask her what she was thinking when she turned so early/late?

It's a worrisome matter for most, male, or female the first time. WOW ...... what feeling once you are back to the dock..

The first time I went out it was an ordeal. We use to drop the sails at the entrance to the channel. Nobody was there to keep the bow in the wind. She kept falling off in 20+knots. I thought, well sail her into the marina where it is calmer. I got inside the marina, and suddenly everything looked so CONFINED! I was getting nervous trying to figure my next move. While thinking there was my slip in plain view. I squeaked the wind as tight as I could, and sailed into the slip with the motor idling in nuetral. I nudged the dock gently, stepped off the boat, and tied her up. It was nerve racking, but there was no stopping me after that.....CONGRADULATIONS on a great step forward, and BEST WISHES in improving your boat handling skills!.......i2f

I am so proud of you in your quest to single hand your boat. Congratulation!
Docking is scary at best and downright heart attack at worse for every sailor. To make docking as uneventful as possible I do a few things first.
First I set up my docklines whether on the dock or on the boat so I can easily get to them. I also color code my docklines. Since the springline is the most important both of mine are RED. That way there is no miscommunication with any helpers as to which line to grab first. My bow lines are gold and stern lines are white. This helps with anyone not familiar with boat terminology. I cannot tell you how important this color code helps out to prevent miscommunication with the end result in getting the right line in the right place. Always put the springline first. Learn how to spring your boat into the dock.
Second is to plan on every docking situation. I break it down into four phases; initial approach, turn into the slip, once in the slip and escape plan if the plan isn't working. All docking situations have to take into account the slip/dock environment, wind, current, freeboard of the boat, turning capabilities of the boat, prop walk, and what is the boat going to do once the boat stops. If the docking situation is new and/or going to be difficult due to any of the above, I had a dry board where I draw out all three phases to give a clear idea of what I need to do during each phase of docking. This helps me for two reasons. One is I have thoroughly though out the process and wrote it down. I draw the docking environment, with wind direction along with the current direction. Writing down the plan than helps because as the docking process starts, anxiety takes over and tunnel vision with thought process can start. Looking at the plan brings me back to what I need to be doing when I get overwhelmed. In addition, with crew members everyone has a clear idea of how the docking is going to take place and what their duties are.
I cannot emphasis how important it is to know how your boat handles under power. Power exercises is so important to do like MOB drills. Here is my power drills.
Spinning the boat both starboard and port. Know how to spin your boat within its own length or shortest distance. Prop walk can be your best friend here. By giving bust of throttle in forward and reverse one can usually turn the boat within it own length.
Backing your boat. Start with S-turns both to right and left doing each at least 300 feet. Do them also starting in different wind and current angles. I practice using my docking orientation taking into account wind and current. I know how the boat will handle exactly now.
Do circles backwards with your boat to port and starboard.
Final drill is starting from a standstill from 4 different directions (90 degrees) using wind direction as the starting point. Notice how the boat drifts, how much room it takes to get boat moving into the direction going with the wind and against. This shows how the boat will behave in tight quarters.
Hope this helps.
As always plans are made to be broken. Be flexible and adjust accordingly.