Rent/baby

Dropping of my 5 year old boy to day care with 1 year old girl in tow. Ex comes by on her hospital break and dives in with kids. The boy is acting super excited running around and not joining his class and 1yr old screaming for mommy. She then gets stressed that she had to leave while holding a screaming baby. Staff must have been rolling theirs eye witnessing it all in its shit/show glory. She leaves stressed and later texts. “Sorry about that”. I tell her it was a bit disruptive and if she could visit at other times. For context I made our separation “Fb official” the night before. I get it’s a good intention on her part but why?