This having come to his stepmother's ears, she taxed him with it on the afternoon before her death, and a quarrel ensued, part of which was overheard. 
( ( ( ( ( This ( having ( come ( to ( ( his ( stepmother 's ) ) ears ) ) ) ) ) ( , ( ( she ( ( ( taxed him ) ( with it ) ) ( on ( ( the afternoon ) ( before ( her death ) ) ) ) ) ) , ) ) ) and ) ( ( a quarrel ) ( ( ensued , ) ( part ( of ( which ( was overheard ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT This)) (VP (VBG having) (VP (VBN come) (PP (TO to) (NP (NP (PRP$ his) (NN stepmother) (POS 's)) (NNS ears)))))) (PRN (, ,) (S (NP (PRP she)) (VP (VBD taxed) (NP (PRP him)) (PP (IN with) (NP (PRP it))) (PP (IN on) (NP (NP (DT the) (NN afternoon)) (PP (IN before) (NP (PRP$ her) (NN death))))))) (, ,)) (CC and) (S (NP (DT a) (NN quarrel)) (VP (VP (VBD ensued)) (, ,) (NP (NP (NN part)) (PP (IN of) (SBAR (WHNP (WDT which)) (S (VP (VBD was) (VP (VBN overheard))))))))) (. .)))
A love affair sparked just moments before her death.
( ( A ( love affair ) ) ( ( ( sparked ( just moments ) ) ( before ( her death ) ) ) . ) )
(ROOT (S (NP (DT A) (NN love) (NN affair)) (VP (VBD sparked) (NP (RB just) (NNS moments)) (PP (IN before) (NP (PRP$ her) (NN death)))) (. .)))