Jean could tell absolutely, and even if she wasn't a telepath like her dreams yet she was talking to her oldest friend. It didn't take a mindreader to tell Emma wanted to.
"Oh please, you know I'd be hopeless at lesbian sex, and you'd have to run off to find someone more satisfying." Jean shrugged slightly.
"And things do last, Emma. It just sometimes takes work, and takes making the first step. Maybe you won't have to say anything. Just show up and let things happen. Just say yes."