Just Another Unsolved Mystery of Life

This morning dawned, bright and warm, but like every other day, the sun sets and the world becomes dark and cold once again. I awoke to a pleasant surprise this morning. Abigail had snuck out of bed before the sun rose and prepared an exquisite breakfast which she served to me in bed. Throughout the morning she was very affectionate and seemed to be in an almost ethereal mood. I was sorry I had to leave the house for work.
Oddly when I arrived home from work, Abigail's loving attitude had diminished considerably, and by bed time, she had become cold and unresponsive. It escapes me what could have caused her turnaround. Who in this world can fathom the happenings within the mind of females?