Tread on somebody’s toes
Definition 1 of 1
Pro Tip 1/3Unintended Harm
Used when you accidently hurt someone's feelings or interfere without meaning any harm. 
I hope I didn't tread on your toes by reorganizing the files.
Pro Tip 2/3Privacy Sensitivity
It acknowledges personal boundaries and shows sensitivity to someone's private life or affairs. 
He might feel like you're treading on his toes if you ask about his divorce.
Pro Tip 3/3Caution Needed
Suggests you should be careful not to intrude or overstep your bounds in social or work situations. 
Be careful not to tread on the boss's toes with unsolicited advice.