Answer: Identity assumption
Step-by-step explanation:
Identity assumption in terms of coming out plan is defined as way through which a person identifies and accepts their or others sexual position and identity of gender. The individual tends to be nervous and lacks confident for disclosing their sexual orientation to other people like friends, family etc.
According to the situation mentioned in question, Jill has reached the stage of identity assumption where she is recognizing her gender expression through homosexual subculture. Jill hasn't told her family and other friend about her actual sexual orientation but can happen to tell them after having confidence.