Before I read your sons account I was going to suggest a time slip or a residual replay. You probably make the same trip out daily and perhaps your energy is imprinted somehow. There is the time slip theory where for some reason. They saw YOU but it was out of time.
If your sighting happened out in public I’d say it was a look alike. However this is happening on your property so it’s not likely another person. There are stories of entities that use the visage of a familier person to lure their victims away. Hopefully this is not the case.
I'd thought about that too. But the girls described what I was wearing that day. It was very distinct. And never before had I worn that same look or since. I was wearing an old jean jacket I almost never wore, and it was covered in drywall mud as I'd just been drywalling before I went to pick up the girls at school. As the girls went into the front door, I followed them and hesitated on the porch. I looked towards the stalls and was thinking
"well it's time to feed and I really should feed before I shower so I don't get all dirty after showering....but I'm SO dirty and SO tired, I really would like to refresh with a shower." So I followed them inside. They went down the hall to the kitchen. I turned left into my bedroom to gather clean clothes.
I think the moment I hesitated was the time I split apart.
So here's the weird thing and the story continues. As I was inside getting my clothes, the phone rang. It was in my room because of an old line hookup we hadn't changed yet...long story...anyway it was ringing in my room and the girls were chatting, raiding the fridge by the glass door looking out to the stalls. I yelled
"could you get the phone?! My hands are full!"...no answer (the distance was only 30 feet to the kitchen through an open door with no background noise.) Then one of the girls asked the other
"should we get the phone?"...I yelled louder
"YES, GET THE PHONE!". Then this is the weird part. The phone stopped ringing; and that was when I went out to confront the girls about why they didn't pick up...and then they screamed. The friend of my daughter insisted she had gone in my room to get the phone but it stopped ringing as soon as she approached it. I did not see her in my room, nor did she see me!
The friend was so rattled by this incident that she never returned to hang out with my daughter at our home. She was a horse girl and always wanted to come over to beg rides.
So, apparently the solid me that could be seen was walking out to the stalls. (however upon checking right after, no feed was given to the horses). Meanwhile the invisible me was able to gather clothes, evidenced by the pile in my arms as I walked into the kitchen. How about that? That part still has me stumped to this day and I welcome others' theories as to what exactly this means on a physics/metaphysical thought?