Why did this person offering to buy me something really get under my skin?

This person offered to buy me a hand held shower after I fell and proceeded to ask someone to help me put it in. I told her I have someone to help put in on but I’m going to decline the offer but thanks… why did she annoy me so bad about this. Do you see anything annoying here

Why did this person offering to buy me something really get under my skin?
Post Opinion