What have I gotten myself into?

So, we got a dog about a month and a half ago. The kids love her. She is now 9 months old, but she is pretty calm for a puppy. We all like to play fetch with her and the kids like to throw blankets on her. She takes the abuse really well. Her name is Mollie, she is a lab/collie mix. She has been a great addition to our family(some days more than others). Here are some pics.

Mara loves the dog (she actually just likes to boss it around)

We took her over to make friends with my brothers dog and it actually went very well. They got along awesome and we now do regular 'playdates'.