When There’s More At Stake than Just a Fit

Can you offer some counseling/suggestions for this problem?

Unintentional model:
C: sister and daughter are gay and parents don’t know because of the threat of retribution.
T: I’m being manipulated and having to lie to hold the peace
F: Angry
A: Keep the secret while wishing for a painless way out
R: Staying in line with my parent’s wishes while keeping secrets behind their back to protect myself, my sister, and my daughter while waiting for them to die.