Jiang Xuejun ultimately let her Primordial Spirit enter the bottom of the Bowl, entering the blood-drenched heart, and within it, the Heavenly Lust World...
Her mana had already exceeded that of an ordinary Heavenly Immortal by much, but her Primordial Spirit had not achieved Pure Yang, with many yin residues yet to be refined, which gave the Sky Lusting Sect Leader plenty of opportunity to exploit.
If it had been Shi Sheng, since Shi Sheng had cultivated the Yang God, pure and devoid of yin, he would not have been so easily invaded by external demons and would have had a chance to withdraw upon realizing something was amiss; even if trapped inside, at most he would have been confined for a while, and as long as he could stand firm until someone came to his rescue, aside from some loss of Primordial Qi, there would not be too dire consequences.