To be approved, your aunt must demonstrate she has strong ties to her home country + she can afford the entire visit on her own + she intends to visit for just a couple of weeks
Thanks Bryanna,
On your last point, must it be for just a couple of weeks, can't she visit for jut three months? Better still, can she say she will visit for 2 weeks and then stay up to 3 months, since she will be given 6 months