After my husband died suddenly from a heart attack, my world crashed around me. My six children were all under 10, and I was burdened with the responsibilities of earning a living, and caring for the children. I was fortunate to find a wonderful housekeeper to care for the children during the week, but from Friday nights to Monday mornings, the children and I were alone.  One Friday evening I came home from work to find a big pretty German Shepherd  on our doorstep. This dog seemed to intend to enter the house. The children liked "German" immediately and begged me to let him in. I agreed to let him sleep in the basement. That night I slept peacefully for the first time in many weeks.  The following morning we made phone calls and checked lost-and-found ads for German's owner, but with no results.  On Sunday I had planned to take the children on a picnic. Since I thought it best to leave German behind in case his owner came by, we drove off without him. When we stopped to get gas, we were amazed to see German racing to the gas station after us. No way was he going to be left behind.  Monday morning I let him out for a run. He didn't come back and we were all disappointed. We were convinced that we would never see him again. We were wrong. The next Friday evening, German was back on our doorstep. Again he stayed until Monday morning, when our housekeeper arrived.  This pattern repeated itself every weekend for almost 10 months. We grew more and more fond of German. We took comfort in his strong, warm presence, and we felt safe with him near us. As German became part of the family, he considered it his duty to check every bedroom to be sure each child was cozy in bed.  Each week, between German's visits, I grew a little stronger, a little braver and more able to handle; every weekend we were no longer alone and enjoyed his company. Then one Monday morning we patted him on the head and let him out for what turned out to be the last time. We never saw German again. The dog first came to the family when  _  .
it was needed most the writer became strong enough the writer was away on a business trip the writer was busy on the weekday