My niece is gay she kissed a friend who just told her she has herpes from another male partner. This happened about 1week ago. Can my niece contract her disease from this.;)
How quick can she get it and does she have to go to the doctor.

Yes, she can. Oral herpes is an infection caused by the herpes simplex virus. The virus causes painful sores on your lips, gums, tongue, roof of your mouth, and inside your cheeks. It also can cause symptoms such as fever and muscle aches. Provided is a link which may better address any of your other questions or concerns.

eMedicineHealth:

Yes, the herpes simplex 1 strain is contagious and can be transferred through bodily fluids including saliva. Typically, if a herpes outbreak occurs because of contact with a blister, it will happen within a week's time. If a week passes with no symptoms, she may have dodged the bullet on that one.