I can't trust …
I can't trust her.
No puedo confiar en su palabra.
I can't trust his word.
No puedo confiar en lo que ella dice.
I can't trust what she says.
Honestamente, no puedo confiar en él.
Honestly, I can't trust him.
Hay veces en que no puedo confiar en él.
There are times when I can't trust him.
I can't trust him.