Explain in Words

An explosion went off in Aina's mind. Of all the things she thought would happen today, this was the very last. For a moment, she couldn't sense anything else but the sensation on her lips. Her heart fluttered, her blood ran hot, and her lower belly pulsed with an odd feeling she would have trouble putting into words. 

Her weight subconsciously fell onto Leonel, her palm pressing to his chest and her lips weighing heavier on his as though to fuse with him. With how Leonel had sat up and how she kneeled on both legs, the shift in balance wasn't a lot, but it was usually more than enough to force someone else to waver. And yet, Leonel's body was like a sturdy wall, not shifting in the slightest even as Aina leaned into him.