Over excited with my aunt

I have a female mutt 4 months old and 11 kg already. She is very social with all animals including humans, friendly and very brave! I have a situation with her and my aunt, they love each other and cannot control themselves at all. I am trying to teach my puppy to not jump or react to people and perhaps it is working so far, but whenever she sees my aunt forgets everything. Typically they see each other once or twice a day, but wonder if this will affect greatly my training. Can someone more experienced share some thoughts as this is my first dog in my life.