Just ask him to tell you before. I'm also quiet during encounters. I alway warn my partner.

Most of the time yes

Sometimes I can feel his cock swell or start to twitch but not always. But he always needs to warn me when he's about to cum, cumming in my mouth without warning is a big red flag.

Some times. But also, sometimes not.

Most of the time you can feel the twitching right before it happens 😋

But if he is very internal about it it can definitely be a surprise 😅