@Angélique LaCava
Hi Angelique, I looked through some of your photos, physically you look very pretty and completely passable, I have not seen any videos of you ( would love to though if you could post a link...) if there is something giving you away then it might either be your voice or the gait of your walk, or perhaps certain mannerisms. One very feminine looking girl on Susans was outed by her teeth! - male teeth are different from female teeth - it was her dental hygenist - who she is currently dating!!.... (@AlaskanDanielle) So it could be something quite unique.
The first thing I do when I'm not sure someones gender is look at their hips to waist to shoulders, second I look at the bone structure in their face, jaw, chin, brow. I can't see any giveaways in your pics, so I'm assuming its something else she noticed.
You look great btw,
Sonja.