Answer:
a micro expression
Step-by-step explanation:
A micro expression defines that the person want to hide his feelings from another person and do not want to share his actual feelings and for less than a second it appears on his face is called micro expression.
Therefore, in the given scenario Deborah bought a fur coat and happily went to her husband, her husband showed that he is happy but actually he was not happy his face was like frown so that is called micro expression.