The grammar escapes me.
Context: Procris after hearing rumors (false) about her husband, suffers from "suspicious mind". Tormented by the rumor, she still doesn't want to believe it.
Metamorphoses, book 7, line 833 f.
indicioque fidem negat et, nisi viderit ipsa,
damnatura sui non est delicta mariti.
she refuses to believe the informer, and unless she has seen
she is not going to believe her husband guilty of the charges.