There are no boundaries between them.
No limits, at all. To anything they decide to do.
Whenever they share stolen kisses behind his room door just a couple of minutes before their mom calls for dinner.
Or holding hands under the covers, watching a silly movie on tv, sprawled on the couch.
Much the less when she gives him head on their way to school. While he drives. As if she cares...
Not even late at night, when he sneaks into her room, eagerly ramming her to oblivion on her bed, stifling her moans with his kisses.
Absolutely, no boundaries.