Can I use css/js from dependent module drupal?

I have two modules on Drupal 7. I want to make dependent module load css/js files from other module.

Parent module info:

name = mymodule
description = ParentModule
core = 7.x
version = «7.x-1.0»
configure = admin/config/content/mymodule
files[] = mymodule.module
scripts[] = mymodule.js
stylesheets[all][] = css/main.css
stylesheets[all][] = css/mobile.css

Dependent module info:

name = mysecondmodule
description = DependentModule
dependencies[] = mymodule ; here I inject dependences
core = 7.x
version = «7.x-1.0»
configure = admin/config/content/mysecondmodule

Main module is dependent. All what I want, to create "parent" module, that will contain only css files (and nothing else) that could be loaded from my main and other modules. I know the best way is Themes, but I need that.