I (M28) was cheated on by my ex-fiance (F28) and now she is asking me to do fertility tests for her

Should I still help her through Infertility testing after she cheated on me? Hi all, this is a follow up from https://www.reddit.com/r/relationship_advice/comments/140vpas/my_fiancé_f_28_has_admitted_she_isnt_attracted/?utm_source=share&utm_medium=android_app&utm_name=androidcss&utm_term=1&utm_content=share_button. Since then, myself and my ex-fiance have officially broken up after she admitted…