Companion Care Needed

About who needs care: My mother-in-law needs care while we are on a 16 day trip. She is quite independent. She needs someone here while she takes a shower (she does not need help in the shower, just for someone to be here, in case). She needs someone to help prepare dinner or to do light shopping. We would like someone to be here overnight, just in case she needs anything. Services needed include: meal preparation, errands / shopping, and light housekeeping.