How to pucker up lips in blender?

Hey guys. So I'm pretty new at creating poses, and I was wanting to create a pose for a sim who is getting married. I want her to kiss her father on her check, I have everything else figured out except how to give her kissy lips. I have tried right clicking on the lip dots to see if I can change "bones" and also pressing g to move around the object, but nothing puckers them up. Is there anyway to do this?? Thank you in advance!