Why should I take my sister when traveling with my girlfriend?

Maybe your girlfriend didn't want to let her sister go, just wanted to enjoy a love trip that belongs to you two. But her sister knew that the place you were going to travel was beautiful, so she was tempted and wanted to go, so she begged your girlfriend to take her. So she can hitch a ride and have someone to accompany her out.

Your girlfriend doesn't want to hurt her sister. Maybe she is a minor and needs someone to take care of her. Their father asked your girlfriend if she could take her with him. Your girlfriend couldn't refuse, so she took it. It was an accident. Don't think too much. Don't think that your girlfriend took his sister on purpose, it's just a coincidence.

Of course, it is also possible that your girlfriend brought her sister on purpose. She knows that her sister has a holiday, and it's boring to be alone at home. Plus, your girlfriend is afraid that you will travel together, and you haven't moved in together yet. Then go out at night, it is too wasteful for two people to live in two rooms, and it is not appropriate to live in one room. If you bring your sister, you will avoid this embarrassment. More importantly, with her sister's company, you will behave yourself, and there will be no excessive intimacy, so that the relationship between your can be maintained.

I think your girlfriend did the right thing. After all, girls should respect themselves, which shows that your girlfriend is completely honest, not casual. You should be honored to have such a girlfriend.