Complex sentence: After sharing a short relationship with her, Will concocts the idea of attending a single-parents group to gain more short-lived female companionship, inventing a two-year-old son named Ned.
Split into simpler sentences: After sharing a brief relationship with her, Will comes up with the idea of attending single-parents groups to meet potential female partners. As part of his ploy, he invents a two-year-old son named Ned.