I live in Thailand,and most bathrooms have a toilet water spray you can clean yourself with. My wife uses it most of the time when she uses the bathroom.
After sex, she usually urinates within a few minutes of finishing, and insists on using the spray to clean the urine off. I worry that the water from the spray she uses, which is quite fast, could force any remaining sperm into her vagina (we use condoms, but they are not 100% safe, obviously).
Is this impossible? Should she use only toilet paper to wipe after peeing instead? I know this might sound silly, but we already have the only child we want, and I have a tendency to obsess over the risk of another one.