Newly elected Machakos Senator Agnes Kavindu Muthama was sworn in on Tuesday.
She becomes the fourth elected senator to serve after Nakuru’s Susan Kihika, Prof Margaret Kamar (Uasin Gishu) and Isiolo’s Fatuma Dullo who were elected in 2017.
She replaces late Senator Boniface Kabaka.
Wiper Party leader Kalonzo Musyoka accompanied her to the House on Tuesday.
Ms Muthama, the ex-wife of former area Senator Johnstone Muthama, won in a landslide victory in last week’s by-election.