Mother and two children recall ufo experience

It was a summer night around 9 pm and my mother and my sister and I were swimming in our above ground pool in our back yard.  We had heard a light buzzing sound and turned around to see a craft with orangeish colored lights, hovering less than 20 yards from us.  That is all any of the three of us remember and in fact we didn't talk about it for almost ten years, like it had been teporarily erased from our memories, until one night when someone brought up UFO's and the three of us spoke up about our experience.  How could someone put something like that into the back of their brains.  After talking about it for awhile, none of us recalled the craft leaving and we believe that we may have lost some time.
Witness indicates that the date of the event is approximate.  PD