In 1986 NC, a red and yellow glowing object appears to mother, son, and daughter leaving them without memory of it

The object, which was a spherical red neon-like light, flanked by two smaller yellow neon-like spheres, flew very low over the countryside until it came to hover directly above the heads of my Mother, my Sister, and myself. This was late 1986. It was only until very late in 1997 that I remembered seeing the object.  Upon asking my sister and mother about it, they remembered it then as well, and ONLY UNTIL then. Neither of us remember the object leaving, or us going home, getting back into the care after seeing it,...nothing.
Date is approximate.  PD