Not necessarily big tits mature women, at least for me personaly. Just mature women. Mei Plumblossom is top tier Waifu candidate for me, and hers are rather humble breasts if one might say so.
I dare to assume in the jail.... for... you know ? Molesting children ?
Unless its a legal loli (you know those types in anime world, who are fully adult yet have the body of a 10 years old ? not exactly sure our FKG lolis are in that category though), then its all fine XD