Finally comes to understand how lonely she is, but then An Unexpected Encounter happens.

The stares of all the young men, AND a few girls she noticed, really made it click in her head about one simple fact. Summer Rose was very lonely. She had been able to ignore for a long time because she had been taking care of the girls, but with them gone to Beacon it truly comes to the forefront now. She had tried to masturbate a few times, this proved to only be a stop gap. "I haven't had a good and proper orgasm since Tai." She thought to herself with a frown. She had tried at different times to masturbate, but nothing really rocked her world like Tai did. Summer never considered remarrying, she knew that Tai was their dad no matter what. But she was missing something and Summer knew it.

Because she was so wrapped up in her thoughts, Summer didn't mean to bump into this person she just realized was there. She nearly falls but is caught by her arm.
"I'm sorry I wasn't really- Oh!"