Here’s how it works (seriously):

• lesbian couple, ie two women
• one comes out as “trans”
• the couple is therefore now one man and one woman
• the woman is therefore now straight because she’s sleeping with a “man”
• if the woman says no I’m a lesbian she’s a bigot because she’s denying the truth of the “man” in the relationship
• so the lesbian couple are now a completely straight heterosexual couple

My guess is that’s why they broke up - because the lesbian insisted on being a lesbian not a straight woman. Leftist logic always eats itself in the end.