(Portland, OR)  --  A nanny is scheduled to spend a year-and-a-half behind bars for leaving two young children in a van in 90-degree heat while she was tanning in a salon.  Kristin Marie Jones pleaded guilty yesterday to multiple charges, including criminal mistreatment and recklessly endangering.  Authorities say Jones left the three-year-old boy and two-month-old girl inside the vehicle in May of this year, during one of the hottest days of the spring.  Jones will also be on probation for five years.