There is some kissing, but there is no nudity.
We see a woman lying on top of a man, both fully clothed (she is reenacting something which she used to do with her husband), the two are facing one another and the camera focuses on the closeness of their faces. The scene is however non-sexual.
There is no male or female nudity.
Brief conversation revolving around a sexual encounter that happned in the past, the encounter is not described graphically.