The Household mistress wants an extra service while her husband is abroad

The castle's master is traveling. I had to go shopping just for her today. I have informed Alexa, the house mistress, that I would be tardy due to the large number of buyers at the market. She advised me to take my time and didn't seem upset at all. The back door was open when I got there, and I could hear noises from the other side. Screw it! I'm sure I'm fired because I just caught the mistress jerking off. Alexa approaches me, seems unconcerned, tells me to use caution, and extends an invitation for me to come in with her. I've been called in for an unforeseen special service, so today is lucky for me.