I'm more femme than my partner, and my partner is definitely not full butch, so a straight person might read them as femme (they have long beautiful hair for example, but is more likely to wear a t-shirt and shorts, while I'm more likely to be wearing skirts and dresses and cute wraps, etc.). So between the two of us, I'm "the femme", but the gender expression might lead people to see two femmes.

EDIT: I should say, because I'm a trans woman, I'm very much not into presenting butch, I have dysphoria and imposter syndrome so I probably go more femme to compensate and feel better in my own skin. This does leave it to my spouse to butch it up more, but that's a challenge I think - they have a unique gender that combines both elements, but straights mostly read the fem parts and don't pick up on the butch parts.