왜냐하면 is "because", abbreviated from 왜냐고 하면, which can be directly translated as "if you're asking, because ...".

The easy explanation " because, 에슐리 is liking something"    or 

" because, 에슐리 is ( what someone like) 좋아해주니까요"

As a result  something or  someone    

They are both possible.

It can be translated into 'since Ashley like it.'

And yes it has to do with liking something but what Ashley likes isn't mentioned.