Shuga has a very big personal bubble that she takes quite seriously. She doesn't care for giving or receiving physical affection. If you are very touchy-feely, she steps aside to show that it is unwelcome. This is a part of her personality that probably won't ever change a whole lot, and I'm okay with that because it's who she is.
But she's definitely becoming much warmer toward me. Today she not only allowed me to infiltrate her personal space, but also to rest my head against her. And she allowed me to stay there long enough to snap a few pictures! I can't express how hugely big this is to me.