A Vancouver man said he was seeking vengeance against his wife when he met up with a teen for sex at a motel room. But his plan backfired when the girl and her friends robbed him at gunpoint instead.Alvino Soto-Arriaga, 31, told the judge Thursday that he should have never met up with the 17-year-old girl, who he thought was of legal age, and he should not have called the police.Soto-Arriaga pleaded guilty in Clark County Superior Court to patronizing a prostitute in connection with the bizarre twist of events and will serve 26 days on a work crew. He initially faced commercial sex abuse of a minor and communicating with a minor for immoral purposes, but those charges were dismissed as part of a plea agreement, Deputy Prosecutor Colin Hayes said.“This was a very unusual and specific set of facts that led us to where we are,” Hayes said after the hearing.Soto-Arriaga was robbed at gunpoint at the Guest House Motel, 11504 N.E. Second St. in Vancouver, on May 26, 2015. Two of the robbers, Cinthya Araiza, then 17, and Selina Quitugua, then 16, had arranged to meet with him so he could pay Araiza for sex, according to court records.However, the girls and Robert E. Mitchell, then 19, and Tylor M. Myers, then 21, all of Vancouver, planned to rob Soto-Arriaga instead, a probable cause affidavit states.