Tsuma no Haha Sayuri
English title: Sayuri's Mother-in-Law
Japanese title: 妻の母さゆり
Alternative titles: My Wife's Mother Sayuri
Type: OVA
Source: Visual novel
Episodes: 2
Status: Finished Airing
Aired: Oct 21, 2011 to Feb 17, 2012
Duration: 27 min per ep
Rating: Rx - Hentai
Studios: Y.O.U.C
Producers: Digital Works
Licensors: Kitty Media
Genres: Hentai

The main character is a white-collar worker. He has a wife, but she runs away from home. When he is at a loss what to do, Sayuri, his wife's mother, reaches out for him, "I'll replace her... Please..." As he lives with her, he gradually falls in love with her, and so does she...

(Source: VNDB)