A source from the party said it may decide to ask for the resignation of Jumpita Chantharakhajorn, who is still recovering from the road accident.
Jumpita has not yet reported to work after winning her riding in the election earlier this year due to the accident and her injuries, and has so far not attended any meetings of the House.
The source said the party may field her husband, Pharatthachote Chantharakhajorn, in the subsequent by-election.
Jumpita won the election with 34,164 votes, beating Democrat Party candidate Surachai Anudthato with 18,970 votes, and Phalang Pracharat candidate Rawan Netrphokaew with 18,741 vote. Former Nakhon Pathom MP Padomechai Sasomsup, who ran for Chart Thai Pattana, received only 12,279 votes.