surviving可单独作后置定语吗

Every affair will redefine a marriage, and every marriage will determine what the legacy of theaffair will be. Although infidelity has become one of the prime motives for divorce in the West, I’ve seen many couples stay together after the revelation of an affair. I believe the odds are in favor of Priya and Colin’s marriage surviving, but the quality of their future connection will depend on how they metabolize her transgression.

问题：

请问are后面的表语是什么？surviving是形容词修饰marriage吗？

I believe the odds are in favor of Priya and Colin’s marriage surviving.

in favor of视为复合介词，后接动名词复合结构。然后介词短语作表语。

Priya and Colin’s marriage surviving中动名词surviving是中心词，前面部分为动名词的逻辑主语。