Inga (1967)

Inga (1967) is one of the most erotic films to come out of Sweden. And that's saying something! A widow (Monica Strömmerstedt) is hooked up with a much younger man (Casten Lassen) when her 17-year-old niece, Inga, (Marie Liljedahl) comes to live with her. But with all the money Monica spends on her young buck, there's barely enough dough to go around. That's when Johnny on the spot Thomas Ungewitter, an old friend of her husband, offers Monica money for sex. Not one to put herself out--or to put out--Monica offers her niece instead. There's enough titillating trysting going on to make your Swedish meatballs nice and tight.