I believe the answers you are looking for can be found in this book: https://www.amazon.com/Journeys-Out-Body-Out-Body/dp/0385008619
You and your mother are experiencers. Most people keep these details within the family as it is socially unacceptable to talk about. Many people approach this topic with the ontology that you saw a physical craft that is distinct in it's existence from you and if you had not been there, it would have still appeared - that you're being there was just a random probabalistic outcome.
As you study UFO's you will realise this is not the case. You also realize that when experiencers tell you that he/she and their family members see UFOs, you are not being told the full story and that there is other "abnormal" experiences going on. I do not mean that you are crazy. I mean that when you find someone who sees UFOs and it is in their family, it is highly likely that they also experience other abnormal phenomena (presence, psi, ghosts, esp, precognition, outlier behavior). This is all part of it and normal.
Its about you. You participate in the phenomena itself. We don't know how or why yet, but i would recommend you start meditation practices and research Robert Monroe if you have not already. It seems separate from UFOs, but it is not.