Complex sentence: Tina asks Jason if he is in love with her and, after he confesses, she tells him she reciprocates and move in to the flat above "The Kabin" after their bid to buy is accepted and they renovate it together.
Split into simpler sentences: Tina asks Jason if he is in love with her and, after he confesses, she tells him she reciprocates. They move in to the flat above "The Kabin", after their purchase bid is accepted, and they renovate it together.