My daughter’s male colleague got a bigger pay raise. They both started on the same day. How can she broach this subject with her boss?

“She has also dealt with a couple of men at her company who have tried to date her and wouldn’t give up even when she repeatedly turned them down.”

My daughter’s male colleague got a bigger pay raise. They both started on the same day. How can she broach this subject with her boss?
“She has also dealt with a couple of men at her company who have tried to date her and wouldn’t give up even when she repeatedly turned them down.”