MANILA: President Ferdinand Marcos Jr. once thundered at lawmakers: “Mahiya naman kayo!” — “Have some shame!”The call helped trigger a probe, which has reached his own cousin, Martin Romualdez (ex-House Speaker), who has resigned, been detained while faces a plunder case over alleged kickbacks from infrastructure projects. A court has also ordered his 90-day preventive suspension.Romualdez is not alone. A senator and a former senator are also…