Get so close to orgasam and I have to stop..

My husband and I have been together 8 years. I always come so close to having an orgasam but I start to freak and stop him. Yes, it feels amazing and I guess it feels to good that I start to like convulsions lol. And I know that I'm going to be super loud, I'm a super loud person and I just can't do that because not only do I not want to wake our 6 year old up but my father also lives in our in law suite.

Hubby says I always ruin the mood when I fight it and stop him, which I can totally understand why. So I finally bought a pretty cool vibrator that is suppose to help with that but it's always the same thing. I take the vibrator away before it actually happens! Any advice? Anyone the same way?