No, Mrs. vdM heard Oscar crying like a woman AFTER he shot Reeva, just as the next door neighbors reported and later attempted to demonstrate in court. The fact that they heard this crying shortly after the final shots confirms it was Oscar.
I am not saying Oscar cannot cry like a woman. People's voices can get very distorted by emotion when they are crying or wailing in anguish. However, I find no reason to doubt the testimony of the four witnesses who were unwavering in their assertion that they heard a woman screaming in mortal fear before and during the final shots. The pitch and shrillness of a woman's voice when screaming in fear is much less likely to be confused with a man's voice than when either gender is crying (as in grief-stricken or in emotional pain.)
Have you ever heard a group of young girls screaming at a pool party? I don't think anyone would ever mistake that sound for young boys.
Several witnesses seemed confused about whether to describe what they heard as screaming or "crying"-- it may be a language problem, not sure. Mrs Stipps' housekeeper may well have interpreted Reeva's screams as "cries" or she had the timing wrong, I would need to revisit her testimony.