Backend of last year, after some training, Mrs Jay managed to fist me, hand fully inserted and make a fist. We have done it a few times since and it feels great. At this time she's decided she doesn't want to be fisted anally, though I would be happy to oblige. She likes to be partially fisted vaginally (flat of the hand, four fingers up to the last knuckles), people, us included, still call it fisting, heck in porn they advertise it as fisting, but often they don't get all the way in! Anyhow, our challenge started beginning of last week, I am fisting her, vaginally each day, after work with the aim of getting my hand fully in and forming a fist to fuck her with. I know this may not sound very AO, but as we mainly have anal sex, the vagina can be put to other use. She was tender last week, but her pussy is getting used to it more now. Not going mad or violent or anything silly, but using a gentle but firm stretch as my hand goes a little deeper. Last night we were right on the cusp of getting all the way in, but any of you who use butt plugs or dildoes of any size will know that a millimetre extra can feel huge when you are fully stretched already. So we don't know how long it will take, might go in next time or it may take a month, we just don't know. She is enjoying huge orgasms from this. Orgasms of their own particular kind, even when she is a little tender, and we can't wait till I can routinely push my hand straight in. She was late home last night and I thought we may not have time before we went out, but she came in, took her clothes off, jumped on the bed and said, come on, fist me! I am glad she is enjoying it so much and has found a new or should I say modified/improved use for her pussy that doesn't have to involve the penis.