I would love to know how you feel while she's gone. So, please repost after it happens. It will be a good test to gauge the degree of your cuckoldry, lol.
The very first time my wife spent the night with her bf (not at our house) it was at his house. I probably masturbated about 10 times while she was gone, lol. She enjoyed it very much. I remember her telling me how different, but exhilarating it was for her. Not just to be having sex with another man in his own house, but to walk around another man's house completely naked was exhilarating for her, as well.
We started alternating. My wife and her bf enjoyed having sex in front of me, while I watched. But, they both enjoyed having alone time together, as well. So, she started spending two or three nights each month at his house. Occasionally, she would spend an entire weekend with him.
He was a wealthy guy with a big house on acreage. He had a pool with an outdoor hot tub. She would spend the entire weekend with him naked. except for when they would got out for dinner. His house was secluded enough for her to be outside naked. So, she spent a lot of time swimming and sunbathing naked. She said it was like a mini vacation for her.
I loved it, as well. My wife spending time with her lover this way felt completely natural and normal to me. But, cuckold psychology is difficult to explain, lol.