Corby-based MEP Margot Parker has quit as deputy leader of UKIP.
The East Midlands MEP is one of a number of people to resign in recent days from key positions in the party.
It comes as pressure is mounting on UKIP leader Henry Bolton to quit.
Margot said: “I have spent the spent last few days wrestling with a very difficult situation.
“I had hoped Henry Bolton, UKIP leader, could ride this out but I came to the decision he could not.
“The personal life took over the job he was elected to do and has put the party in limbo.”