She needs to be on broad-spectrum antibiotics as per the urine culture report. She may be prescribed oral / injectable antibiotics as per sensitivity. Since she has to look after a small baby, injections may be administered on outpatient basis if she is otherwise stable. Severe infection will require hospitalisation. Your gynaecologist will be able to decide this. Ensure that your wife takes a lot of liquids to flush out as much urine as possible. Also ensure enough proteins for wound healing and lactation.