[Her first instict is to tense up, and she's already reaching to push her away before she's aware of it. She catches herself in time though. And just...

...processes it. Because she is a scientist, and unlike Harley she doesn't like to act and see what happens. She actually likes to think things through.

So she takes a second... two... three...

Before tilting her head and closing her eyes, kissing her back. They can... talk about this later. About what this means. She can allow herself a kiss.]