The whole plot involves an infidelity of two married persons-a woman and a man- to their husband and wife, respectively. They get a baby, so sex is implied but not shown. Although, some mild kisses appear.
A female dancer does a dance, as it was usual in pallaces and courts in that days, with contortions and twistings that may have some erotic component (but nothing explicit) like hip movements. She only shows the belly.