A friend of mine said her friend book her trip to stay for a month with her boyfriend who is a Canadian citizen. However when she landed in Canada she was sent along with many others in a different line to be question separately by border officers. She landed at around 8 pm that night and was held until after 12 am after being interrogated about the one month time that she will be staying and other personal, bags searched thoroughly and so on she was the only one left. Upon being released in the country they told her she must return on her return date which was a month later and stamped her passport as usual but this time wrote in the stamped area her return date. Questions: Does this mean that she can"t extend her trip if she wants to, giving that they say visitors have up to 6 months in the country? Does this mean that if she stay pass the one month she overstayed? And if she overstayed can her bf still sponsor her from within?