I wouldn't say so. I think insecurity would come more from hard aspects to the sun or moon from Saturn or one of the outer planets.
Venus in Scorpio is supposed to be the femme fatale of the zodiac. She maybe the jealous type, but that probably says more about how Venus is aspected.
Does venus in detriment or fall for a woman and mars in detriment or fall for a man mean the person is insecure?