What does guy sending photos mean?

Few days ago a married guy I had previously flirted with like 4 months ago haven’t flirted with them since we talk on social they message most days and still say the occasional flirty thing to me only time he don’t message is weekends anyways this weekend I get message just before he said he going to sleep he sent my photo of him and his kids I’m little confused why

Updates
+1 y
Also he has told me before he hates photos and videos of himself
What does guy sending photos mean?
Post Opinion