A small smirk fell onto Draco's lips as he went willingly with her. He could handle this, with them both having some alcohol in their system. Granted, she had more than he at the moment, but he still could say he'd had some and leave it at that at a later moment.
His lips connected with hers without a further thought or worry on his mind. He just leaned in, continued to press his lips firmly against hers and just kept snogging her as firmly as he possibly could. It somehow made everything feel better, seem better, if he did this.