How frustrating! I overcompensate the opposite way. I pay for all of my kids' daycare since it is a weekly bill, even though part of the time they are there waiting for Dan to pick them up. I agree she is silly to pester you over $3. However getting caught up in tit-for-tat will just aggravate you even more...

Me-35

Together: 18 yrs
M-12.5 yrs
S-8
D-4
D'd: Feb. 2010

The LORD your God is with you,
he is mighty to save. --Zeph. 3:17