Is it as mistake for two girls to love eachother?

Hey so got a bit of an idea in my head I wanna try. The most basic version is two sweethearts that've been together since about childhood and have been each other's best friends and then lovers. Thing is both are girls, or one is and the other a secret Futa. And Char A(the possible Futa) being generally wimpy either in the nerdy, girly or both type of wimp outside the bedroom, While Char B is some type of sweet but tomboy with long hair and a bod about one step away from porn star being, in their own eyes, their only really feminine trait and thus not the best girlfriend for Char A, despite her reassurances, on both counts, especially in the 'bedroom' where while together could be classified as switches MC has slightly higher tendency to domming and yours to subbing. The reason that bedroom is in air quotes is the two have high libidos and tend to have sex where there is a risk of being caught. Enter the bully a shared NPC(one of us plays when they are interacting with your Char A and vice versa) who catches and takes footage of the two in a fuck-fest and proceeds to secretly start blackmailing Char B, playing on her protective tendencies. And while Char A is really good at sex, the bully is an absolute monster. Que the conflict of Char B being turned into the bully's personal slut while Char A tried to get a spine and save her.

Of course can add modern fantasy, sci-fi or magical girl flavoring to the mix.