Section 623 of The Pennsylvania Penal Code of 1939 (18 P.S. § 4623)
61-8-3. Adultery and fornication; penalty. If any person commit adultery or fornication, he shall be guilty of a misdemeanor, and, upon conviction, shall be fined not less than twenty dollars.
The implications for the first wife are apparent.
§ 97-29-43. Polygamy; teaching of. If any person shall teach another the doctrines, principles, or tenets, or any of them, of polygamy; or shall endeavor so to do; or shall induce or persuade another by words or acts, or otherwise, to embrace or adopt polygamy, or to emigrate to any other state, territory, district, or…