Sure enough, about 2 weeks ago, she built a sac one night and attached it quite securely to the glass and door frame. The egg sac is about 3-4 feet off center of the main web, but still very accessible by Charlotte. The heavy concentrations of silk that look like small cotton balls are attaching points to the glass. She reinforced each guideline with a strong footing. Ultimately, the sac is suspended in the middle of an intricate network. In approximately 150 days from the first of August, the little ones will find their way out of an overcrowded temporary apartment. Instinctively, by throwing out a single strand of silk they will take flight in the wind to a new home of their own beginning the process their mother did the season before.