I loved Gloria as a bitch. It's part of what made her so hot. You have to understand the dynamics of the relationship between Gloria and Joey to know how it created sexual tension. Gloria is a rich, wealthy elite. Joey, not. It starts out with her looking down on Joey, thinking she would be able to take advantage of him, push him around, etc...I've turned Gloria into a sweet ideal Milf instead of her being bitchy in the original game and Linda here is quite naive and horny.
As the sexual relationship develops, she can become softer and softer, but you absolutely can't have her weak and pliable from the beginning. It isn't who she is, and it takes all the sexiness of the character away.