The title and story background while accurate, are a bit misleading; or at least incomplete. When the second episode ends it has a too be continued at the end for which there weren't anymore episode made. To evaluate this based on plot seems unfair as its unfinished, as is though the final product is more like an all action kind of hentai with little bits of the plot here and there.
The story starts out through the lens of a video camera videotaping a couple in the act. Afterwords its revealed that the main female character is now a widow, her husband having
just recently died. Her daughter is living with her, and she's got two tutors that come over on a daily basis to teach her. The main female (the widow) is fond of 'slipping a Mickey' into people's drinks which acts as a delayed story aphrodisiac that turns the person into an insatiable lust monster.
Characters are well drawn and the animation quality is very good. H scenes may bit a tad longer than normal but are full of action. One aspect that I find particularly bothersome, though others might find it heavenly is that all the females have extremely large breasts for their size. Even the daughter that is being tutored (presumably she's either in the first year of college, or last of high school) has at least DD's.
This will likely be a large selling point for most men, though as a female it gets to be redundant and annoying. One, or two depending on the cast size, characters with large chests is to be expected; when they all have them and each is larger than the others is a big turn off for me.
Voices are well done, they match well with the characters personalities (at least as far is revealed). Background music is non-existent or otherwise not worth noting.
Each character has their own personal tastes which is nice for variety. With the storyline being cut off its hard to really say much about them beyond the stereotypical mold they start out with. The widow and one of the tutors (apparently a childhood friend of hers) are the only ones with much character development. The foundations are laid for some good roles but we never know what the final intentions of anyone is. When things finally start to happen the door gets slammed shut and we're all left hanging.
There's enough of a story to hold what's there together well enough, without any kind of conclusion it ends up being more of an all action type of hentai. Since the art and animation is well done it makes for something highly re-watchable when you're all you want is action.
Widow isn't something that you watch for the plot; which is a shame since it has the potential to be really interesting if finished. By no means is it something dirty on the scale of something like Dark Chapel, the action scenes don't have a lot of foreplay and focus more on h-play making it very enjoyable when that's the kind of video you're looking for.