Hard to tell from picture how far along she is but what you do depends on you completely. Do you want to keep and grow fry or not? If you want to keep them, transferring her to a "fry tank" is the brest option-a small 5-10g tank with gentle filtration and clean water that mimics the parameters of your normal tank. Barring a separate tank, a breeder trap will suffice.
Your could just let her give birth as is, and though some fry will get eaten, plenty hide well enough to avoid becoming a male until they're old enough to not be eaten