On one hand, she wholeheartedly believed in Batsheva and the existence of the Messiah, having encountered me herself in her state of expansive consciousness. On the other hand, she felt that Batsheva might be testing her and could potentially be working for Genie to gauge her loyalty towards him.
To ensure this wasn't the case, Ivan immediately contacted one of the security guards under her direct command to bring her the psychedelic drug, stating that she needed it to prepare for an upcoming experiment on her mind to strengthen her mental faculties. She had to come up with an excuse as every request from her would be supervised by Genie later.
