This is usually said with a pitiful tone, meaning, "Oh my, you need some you-time." Well, of course! Me-time is great! But also, if you notice my hands are full with one or more babies, might you be so inclined to help me in some way? Perhaps hold open the door, or coo at my baby while I fish for my credit card to pay for the groceries, or offer to come over once in a blue moon and watch my sleeping babe so I can go get a proper martini?
On the other hand, this statement is often heard even when the children are on "good" behavior. While I might literally have my hands full—holding my little one while also trying to maneuver carrying my order from the café counter to the table—this does not mean, figuratively that I cannot handle what is in my hands. I LOVE these moments: where I can take my babbling, toddling, 2-year-old out for a cappuccino (for me) and hot cocoa (for her) in the middle of the day and just spend some time with her. I do not, in these instances, need you to look down at me with pity.