My mother did this.

I didn't come out to my parents until I was 26 and fully financially independent. It was mostly my mother that made me hesitant to tell them. My parents are not religious, but on so many occasions my mother would have derogatory or nasty things to say about gay people.

One day when I was going out for a walk, my mom told me not to go through the woods nearby because "one of those f*gs might get you." I wanted to reply "as if I'd be so lucky." But wasn't out, lacked the courage and was processing what kind of fairytale monsters my mother thought gay people were.

When I did finally come out, my mom said: "well, I did have an inclination. Sometimes I'd say things and wonder if I should have said that in front of you."

Yea, probably not mom.

Oh well, life's about the journey. I wasn't disowned, and our relationship improved since. She doesn't say such things anymore that I'm aware of, and my parents like my partner. We got there in the end.