Pheu Thai should probe the allegation that a former deputy prime minister committed adultery as a well-known lawyer has vowed to speak on the matter on Monday, according to the party's deputy leader.
Yutthapong Charasathien, deputy leader of the opposition party, said on Sunday he would ask Pheu Thai leader Cholnan Srikaew to launch an ethics investigation into the affair as the allegation concerned "a deputy prime minister in the Yingluck Shinawatra government".
