temitope adebamiro arrested friday and charged with first-degree murder .
police called to home in bear , delaware , on thursday and found husband .
adeyinka adebamiro stabbed in upper body and wife wore bloody clothes .
initially claimed death was a suicide but her story changed several times .
suspect told police husband abused her even while she was pregnant .
now held without bail at delores j baylor women 's correctional institution .