I am no expert, but you very well could have a big problem:
(B) Termination of Stepparent-Stepchild Relationship.
"Normally, a step relationship terminates when a marriage ends, especially if it ends in divorce. See Matter of Simicevic , 10 I. & N. Dec. 363 (BIA 1963). However, under certain circumstances a step relationship may continue after the death of the natural parent or even after the legal separation or divorce of the stepparent and natural parent if there is an ongoing relationship between the stepparent and stepchild (see Matter of Pagnerre , 13 I. & N. Dec. 173 (BIA 1971), Matter of Mowrer , 17 I. & N. Dec. 613 (BIA 1981), and Matter of Mourillon , 18 I. & N. Dec. 122 (BIA 1981)). If the marriage ends in annulment, however, the step relationship is deemed to have never existed because legally the marriage never existed."
