Photographing the mother and groom dance I give particular emphasis on their state of mind. I always use a long prime lens to stay away from the dance floor and capture the moment unobtrusively. I captured 10-15 images during this dance showing different emotions as they spoke to each other. This is one of my favorites showing the calmness and warm feelings of the groom.
For photographers: Canon 200mm f2 IS https://www.usa.canon.com/internet/portal/us/home/products/details/lenses/ef/telephoto/ef-200mm-f-2l-is-usm