Complex sentence: Stuart and Neha have formed a romantic connection as well with Stuart promising to see her in person rather than texting her, and Yo-Yo asserts himself to his mother (supported wholeheartedly by his father).
Split into simpler sentences: Stuart and Neha have formed a romantic connection as well with Stuart promising to see her in person rather than texting her. And Yo-Yo asserts himself to his mother (supported wholeheartedly by his father).