DS is 4yo.
Round at DMs the other day and he comes to give me a kiss on the lips, which is something we always do. DM pulls disgusted face and says "oh, no, don't kiss him on the lips, you'll give him a complex" 
Just a bit of background info, my DM is hardly the most affectionate person. We have a lot of issues in our family re: EA, DV and SA aimed at DM, siblings and I, which she has never really acknowledged or discussed with us (it 'stresses her out').
So really my AIBU is: Is my DM BU to tell me how to show affection to my DS when she never really tried
Or AIBU for kissing DS on lips?
Sorry, am struggling to word anything right atm.
Obviously NC for this too