My mom is/was a badass in the 80’s. She was the only female VP in her international firm. When men would talk to her like this, she’d reply back “sure thing sweetie” or “that sounds good. Be a dear and let my assistant know.” Etc.
I don’t necessarily agree with her actions BUT she felt like it made them stop and realize how absurd it was to talk to someone like that.
Once when I was a very young lawyer, a geezer opposing counsel called me “young lady” in an attempt to undermine me in front of our clients. “I replied, “I’m sure this electronic discovery stuff is beyond your understanding, old man.” He was so mad I thought he was going to have a stroke.
I would do what you’re doing… let your H handle him from now on or copy your H on every text so he sees.
I’d reply, “You didn’t make me happy you made me uncomfortable. Here is my husband’s number. Direct all communication to him going forward. You have no reason to contact me again.”