Even if you had wanted to stop suckling, you would not have been able to. Because unknown to you, your lips have merged with her tit. Forever forcing you to suckle her tit and her never ending flow of milk. Then your body begins to shrink, and finally stopped at doll size. If you had been paying attention you would have seen other doll sized men hanging from her other tits.
When the woman finished transforming you, she went to greet the next person who would become another 'sucker.'