Looking for the Lesbian in Tootsie (1982)

Julie is blonde, beautiful, moderately famous and already entangled in a fraught relationship with the director (Ron) of the soap opera she stars in, and Dorothy is her new homely, older female co-star who has caught the eye of her widowed father, Les. How could Dorothy, perhaps the most unlikely candidate possible for winning her affection, be the one who troubles Julie’s understanding of her sexuality?