An older, middle-aged or senior woman who still retains her beauty and figure. Also known as a cougar or MILF (Mother I'd Like to Fuck). Less common variations such as mature futanari, anthro et al. can also fall into this category.
Furukawa Sanae from Clannad
Hiiragi Miki & Takara Yukari from Lucky Star
Hoshizora Ikuyo from Smile Precure!
Iori Rinko from Gundam Build Fighters
Katsuragi Mari from The World God Only Knows
Mercelida Ygvar from Lotte no Omocha!
Minase Akiko from Kanon
Takasu Yasuko from Toradora!
Touwa Meme from Denpa Onna to Seishun Otoko
Mankanshoku Sukuyo and Kiryuuin Ragyou from Kill la Kill
Nishizumi Shiho from Girls und Panzer