A Wellesley family found a surprise Sunday afternoon while unpacking from a trip to Italy: a stowaway scorpion. The aggressive arthropod stung a woman, who sustained slight injuries, Wellesley police said. Around 3 p.m., Wellesley police were called to a home where a family member had captured the baby scorpion. “The scorpion somehow got in the family’s luggage,” said Sergeant Scott Whittemore. “They went to unpack at the house and a victim was stung.” The creature was “quite agitated” when it first crawled out of the luggage, Whittemore said. The woman who was stung refused further medical attention after being evaluated by EMTs, Whittemore said.