DS is 8, I've been with DP for 4 years and we now have a 6 month old together.
DS1 and DP have a good relationship, DS1 sees his dad once a month.
DP posted a picture of DS1 on his private Facebook account (only has close friends and family) a few months ago, but ex said he didn't want DP posting pictures of his son so DP removed it.
The other day, he posted a picture of DS1 and DS2, and again ex has messaged saying DP needs to remove it.
AIBU In thinking this isn't an issue?