I agree with KnutG, there really aren't too many stories on Lit featuring the dominant male and his story of cuckolding a wife.
To some extent you've got to be a bit specific about what you want. There's a sub-genre of Incest/Taboo stories where the husband/father asks the son to make love to/have sex with/fuck the wife/mother, usually because he's getting old/past it and doesn't want the woman to suffer. There are a few of those.
The big question is, does the husband agree and want to watch, or does he just about have to be tied down?
One example does spring to mind. http://www.literotica.com/s/spanking-kenny's-wife-ch1
. This is actually a six part series and I reckon it's worth reading. Also, try http://www.literotica.com/s/interview-with-a-sub-couple
; although this is a D/s situation, the husband is there to watch - willingly. Similarly with http://www.literotica.com/s/taking-carol
These are all well worth a read; I hope this is the sort of thing you're looking for, but good stories by a dominant male in a cuckold situations are few and far between