This reminds me of when I was in my early twenties, I was with this pregnant girl probably about 5 months pregnant (not pregnant by me) and had her in the same position. I was young and dumb and was fisting her pregnant pussy which she enjoyed :) As I was fisting her I felt her cervix and decided to straighten my pointer finger and shove it into her cervix as far as possible. Needless to say she freaked out in pain and as far as I know she lost it and never gave birth. I feel bad now but it was an experience and I’d do it again as she was a cheating whore :)