Well it seems it runs in the family. Our Dad left when I was very young (I'm the youngest) and it was always my mom, my two older sister and I. My sisters once told me the reason my Dad left was that my mom was/is lesbian, that immediately made sense for me because after dad I've only seen my mother with female friends. But the surprising part was that my sisters told me they are bisexual and already had threesomes with our mother. My mom might prefer girls but my sisters go both ways so I like to be available whenever they need a cock.