Yesterday was a cool yet pleasant day. With temperatures in the low 50s and the sun shining overhead, I decided to take Aerin for a walk despite my lingering cold. (Claire was with her grandparents.) We walked the 22 blocks to my favorite children's park and I sat Aerin down on a swing. She hadn't been there since the temperatures took a dip, so she was obviously over the moon with glee. As I continued to push my giddy daughter on the swing, I noticed another mom with her baby...