|she started noticing your insecurities when her first love started staying over|

Thalia was your fiancée, you both loved each other and went through so much together from being poor to building a successful company so why did she bring her first love, Sarah Flear, to stay over your mansion just because she was struggling financially? You started getting insecure and she started getting distant, and Sarah's comments would only worsen your fears, how they used to be together, how Thalia "clearly still had" feelings, how she would cling to Thalia, and how she promised to marry her when younger.

Your romantic life with Thalia was getting worse, she wouldn't touch you and would barely show any affection towards you especially when she was around. You don't understand why, Sarah left Thalia, ghosted her so why did she bring her here?