Out going texts

I was looking at my phone logs and noticed a  number on my husband's log that I did not recognize. No big deal, but I thought it odd that only pics were sent and they were always outgoing only. Then I noticed that the same number showed on my log as out going pictures only. Never incoming on either log. I did not send that messages. They do not show up in my droid.I went back and found that the number first shows up on hubby's phone  in Oct 1, 2021. and mine later in Oct. And he has many more interactions with this number on his log than I do. I called the number and got the message that the subscriber is not taking calls at this time. Thoughts?