So I liked this piece. The twist at the end - where he discovers he's made magic the first time - was nice, followed by his realization that he's created something he cannot control. Both pretty good twists.
As for the improvements, I agree with Cynic. At the beginning, I wasn't sure whether I was reading flashback or current. Especially when he looks in on his girls. Why are these lines of dialogue italicized? I honestly thought he was imagining them playing in the room. As if his wife had taken them away with her already. I think the line "Back before they were taken from him." threw me off. Looking back, I don't know what that means, what it's referring to.
When his wife comes home, you say his anger had subsided somewhat. That's fine, but then he notices she's been drinking vodka. If I read it right, she's pregnant (based on apron). I don't have children or a pregnant wife, but I would think her drinking while pregnant would piss him off substantially. But he first needs her to hit him and stuff, which is fine, you're trying to build tension, I get that, but I think you could do it more efficiently and effectively with just the alcohol.
The action at the end about bubbling skin and blood and his and her face is also rather confusing. I can't tell most of the time if he's the one getting burned, or if she is, or if they both are. Consider tightening up the prose there for clarity' sake.
I enjoyed it, thanks! Cheers!
Rick