I had an gf staying with me for awhile and the kids saw her once or twice and I didn't think anything of it. I'd only be concerned if they saw sex. Seeing someone just out of a shower is no biggie. It happens all the time.

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As to marriage or celibacy, let a man take which course he will. He will be sure to repent - Socrates

Love is not looking in each other's eyes, but looking together in the same direction - Antoine De Saint-Exupery