Suspecting a wife of adultery

Suspecting his wife of adultery, P. often beat her, as a result of which she and 2 children moved to a private apartment, but then returned to her husband.
On May 9, P. again beat his wife, and she, taking the children, left him. In the following days, P. offered to make peace, but she refused to return.
On the evening of June 2, when the Peninsula had already gone to bed, P. came to her in a state of intoxication and again began to persuade her to continue living together. Peninsula refused. Jealous of his wife to M., who helped her acquire furniture, P. grabbed a kitchen knife and, in the presence of the children, began to strike his wife with blows to various parts of the body. When Victor tried to take away the knife, P. wounded him in the arm. The 7th was stabbed 7 times, including damage to the lungs and heart, from which she died.
Qualify the crime committed by P. Does the murder of the victim in the presence of children affect the qualification of the crime? Show the motives for the murder.