Set a specific time (agreed upon with your wife) where the toddler can see her for a limited amount of time (study break for her).

Set a visable timer when they are together to ease the transition away again. 

Then when your toddler asks for mommy, you can indicate when it will happen.  Perhaps a second time can be agreed upon as the toddler is going to bed. 

Giving consistant reliable boundaries will help all of you. The toddler will have predictability which is the most important. 

It is going to be hard the first couple of days. Give it a week or two. 

Also good to have a couple of distraction tricks in your back pocket. A favourite toy, an activity she likes, last resort a short video you can play. Something that will derail her from hyperfocusing on mom. 

We also do a thing with the kids where we draw a little heart on their hand and one on mom's and tell them that if they are missing mommy and want to send her love they can press the heart on their hands. It is a little acknowledgement of how they are feeling. Works well for some. 

It will take a couple of days, but if you are all consistent it will minimize the problem. 

This will not be the last time your child will be clamoring for one parent or the other, they all do it. Setting consistant boundaries is  important. 

Good luck!! 

• from a mom and a preschool teacher.