I dont see anywhere on the code that it adds either full text or excerpt. So I decided to test the widget and that’s exactly what I got. There is no post content being output.
So my suggestion is to just add
<?php the_excerpt(); ?>
Wherever you want it to output… eg just after the thumb.
<?php $post_images = bdw_get_images($post->ID,'large');?>
<?php the_excerpt(); ?>
I tested it and it worked fine.