Complex sentence: But Sarah has conditions and only ones that can be met by unnecessary needs such as expensive hotel rooms and gifts from Tiffany's, and Steven has to meet good on those conditions even at the cost of swallowing his pride to do so.
Split into simpler sentences: But Sarah has conditions and unnecessarily lavish needs, such as expensive hotel rooms and gifts from Tiffany's. Steven is forced to make good on those conditions, even at the cost of swallowing his pride to do so.