Complex sentence: However, Alexis discovers the truth on the 4th of July when she discovers TJ half naked in Molly's bedroom and bans them from seeing one another again, although TJ was only changing clothes so he and Molly could spend the day at the lake swimming.
Split into simpler sentences: However, Alexis discovers the truth on the 4th of July when she discovers TJ half naked in Molly's bedroom and bans them from seeing one another again. Though TJ was changing so he and Molly could spend the day at the lake swimming.