My husband texts a girl who was his colleague.That irritates me what should I do can I talk to that girl directly.

Why do you have reason to check your husband's texts? Did you have reason to be suspicious that something was going on?

What is the nature of the texts. Is it friendly banter or sexually explicit? Are they making arrangements to meet?

Is he hiding the fact that he's texting her? Do you think there is more to the story?

I would personally figure out if something is going on or not, from your husband.

It's not her you have a problem with, it's him.

If he's never betrayed you before then you can't assume justly. So be careful what you search for. You may not like what you find. If you're right, you'll be crushed. If you're wrong, you'll look like a fool. Be careful.