Ready for Anything(1977)

Anna, a young stenography student who after a chance meeting in a park, begins a steamy relationship with Marco (Bekim Fehmiu) a much older married man, who dotes on his young daughter but is quite happy to cheat on his wife. When they first make love Anna reveals her masochistic streak so it's not long before their relationship takes a much darker turn as Marco increasingly pushes the boundaries between love and abuse in the things he asks her to do.