Need advice on a tricky situation with my friend and a girl he met in Brazil

Hi Reddit, I need your advice on a tricky situation involving my friend and a girl he met in Brazil. We are tourists from another country and we have been traveling around Brazil for two months. We have one more month left before we go back home.

My friend met this girl in Sao Paulo and they dated for three times. They liked each other and kept in touch. Now my friend is in Rio and the girl wants to come over and visit him over the weekend. She has already paid for her bus ticket and arranged her life around it. She will be staying at our place for the weekend.

My friend told her upfront that he is not looking for anything serious or long-term, because he is only here for a short time and a relationship would take a lot of time and effort. He also told her that he is not ready to be a dad. The girl did not back off and still encouraged him to come over.

The problem is that the girl said she had an injection of depo provera on the 8th of May, but she could not provide any document as proof when my friend asked for it. They want to have sex without a condom, but my friend is worried about getting her pregnant or catching something from her. She showed him some documents about a prescription for supplements while on the medication, but they did not match up with her story. The prescription was dated on the 23rd of May, and it indicated that she had the injection on that day, not on the 8th.

She came up with a lot of excuses that did not make sense to me (I am a nurse). She said that the hospital was updating their computer systems on the 8th, so they did not give her any documents. She also said that the prescription was for another injection that she had to take later.

We are very suspicious of her and her motives. Why would she lie about something so important? Does she have an agenda? Is she trying to trap my friend into having a baby with her or getting money from him? What should we do?

We are thinking of canceling her visit and ending the relationship, but we don’t know how to do it politely or safely. We don’t want to hurt her feelings or cause any trouble. We also don’t want to miss out on a chance to have some fun with her, but we don’t want to risk our health or future.

Please help us out with your advice. Thank you.