Duty of care.

Mrsdave is presently out at a Preschool meeting, leaving Buster Boy and the Troll Princess in my care. In addition to this, another friend of ours has left her two children here this evening as she too has a meeting at another Preschool meeting. As a thankyou for watching her kids our friend bought me over a six pack of Boags.

My question is, does she think I need six beers under my belt to manage child minding, or am I supposed to drink them later?