Traveling with female colleagues for two days and doing nothing, does anyone believe it?

Traveling with female colleagues for two days,

It's nothing. Does anyone believe it?

No one believes that if you have a girlfriend or have been married, you can't explain it clearly in front of them.

If it's just the two of you, you're all full of words and you can't tell clearly.

So there is no need to explain, and explanation is equal to covering up.