"What i meant was I don't trust them with my kids."

Unfortunately this is out of your hands. When they are with your W, then she is the one that needs to protect them. Don't involve family members.

"I don't really want to spend the night at her house but it's my right to visit my kids anytime and take them anywhere with reasonable notification."

Why do you need to stay at her house to do so? Have them stay at your place when possible.

M-43 W-40
2D - 9 and 5

Emotion, yet peace.
Ignorance, yet knowledge.
Passion, yet serenity.
Chaos, yet harmony.
Death, yet a new life.

RECONCILED AND WISER