Daughter learned the truth about SMIL

My daughter has confided in me that she is part of the LGBTQ2+ community. I say it this way because she is still discovering how she fits in and what she identifies with. I high-fived her and told her that is super-cool and I was honoured she would confide in me about this. Her dad, whom she told a few days later, had a similar reaction of support and and love.

I think she was so happy with our response that she felt comfortable telling others in her life. We were at my very conservative in-laws place last weekend. SMIL and S had to drive into town . On the trip, S told her SMIL who was less than enthusiastic about it. She asked “where did you hear about that nonsense” and “that is not right for you to think that way”.

I know S was crushed about this response. She didn’t tell me until later, but it made sense why she was quiet on the drive home. I haven’t yet said anything to my husband. S is supposed to spend a few weeks there this summer and was looking forward to it, but since has not made mention of it.

How do I proceed? Is this a LC or NC offence?

Daughter learned the truth about SMIL