I would recommend
http://www.dmm.co.jp/digital/videoa/-/list/=/article=series/id=209788/
Natural High Wife from behind quickie series I think
But somehow its there in the zone but miss the mark badly, the wives always (as in 100%) in all the series was mildly shocked by the colleague advance but later become more than willing party into a 2s scenario , leaving the husband out while they find a new place and continue their tryst.
Alot of attacked by colleagues or bosses singles have these section where scenes where the drunk husband is brought back by the protagonist. However it's never the main theme of the story.
Tameike Goro Studio have many bosses attack movies
http://www.dmm.co.jp/digital/videoa/-/list/=/article=series/id=203479/
E.g like in MEYD-095
you can see in the preview one of the many common scenes in these series where the husband is dead drunk while the wife is forced to well have some fun.
but like I said , these scenes are common but not the main theme of the series and some of them might not have it.
back to the title theme...
one interesting NTR nagae title is i found out is
http://www.dmm.co.jp/digital/videoa/-/detail/=/cid=bnsps00340
by Akemi Horuichi =D .
The story about this couple in financial trouble and a fellow colleague or sorts offer a helping hand , with a condition that the wife live in with him. But no hanky panky , he just wanna feel whats its like to have a married life or have a woman or sorts in the house... I think. Yeah right , that wheres the fun? hehehe
Akemi was quite adamant no sex at first -> Angry after the first morning sex -> more sex. And it climax in a telephone with her husband where they take turns talking to him saying everything is okie while having sex and eventually leaving the line on while they continue. Nagae got really good ideas sometimes.