Addressed #151

Changed

```javascript
return handled
  .sync(_.extend({}, options, {parentResponse: this.parentResponse}))
  .select()
  .tap(eagerLoadHelper(this, relationName, handled, options));
```

to

```javascript
return handled
  .sync(_.extend(options, {parentResponse: this.parentResponse}))
  .select()
  .tap(eagerLoadHelper(this, relationName, handled, _.omit(options, 'parentResponse')));
```