Thank you!!! I love PLL too!!! :)
Most of my theory on Melissa being Black Widow can be found here [x] but really it’s just a compilation of connections and why I think she’s a possible suspect. I don’t necessarily have a reason why I desperately think it’s her, I just feel like it would make a lot of sense if it were here. She’s the most logical person. She’s been connected to everybody who’s died, and mostly in an intimate way. And she’s always known more than she’s let on. Just something really sketchy about that girl!