We tried it for extended periods when I was married but never had the opportunity or circumstances to have her regular lover move in but to be honest, we werent there, it never entered our conversation or minds I don't think as we hadn't been married long when I shared her and we finally did find a black lover she fell in love with. Looking back we did invite him over for weekends and she invited him to stay manytimes without consoluting me and insisted either we all sleep together or she would ask me to leave them alone. She would openly admit to me at first in private then infront of him how her pussy belonged to him and how much better he fucked her than me, demanding him to cum inside her infront of me and then humiliating me while I sucked him in front of her both verbally and having me compare myself to him in a demiunative way. We discussed what would happen if she got pregnant, though she wouldn't do it intentionally we both admitted should it happen, whether I agreed or not, she would have his baby and he would be a part of ours and the babies life going forward and in that scenario, be prepared to accept she would feel expected to keep having sex with him as the babys *******. It was always important with a long term lover staying for weekends or long periods of days during the week for me to witness them having sex and while he was there, accept his place as her preferred alpha lover instead of me and hopefully feel normal and casual with him fucking her pussy and her choosing him sexually over me while he was there and feeling secure and safe admitting her urge for have sex with him and how much she wants him regularly and enjoys seeing me show her and him how much I accept them sexually by serving them in front of her. Living together just didn't happen then but occasionally one would stay a weekend or during a week or even a full week with us on and off with me occasionally letting them sleep together alone at night to bond with me sleeping in the spare bedroom or her leaving me at night in our bedroom for his room only a rob on and even sometimes after we went to bed getting up and bringing him into our bedroom and them having sex. Waking up in the morning to her sucking his cock and me getting them a towel or water. If it was an extended stay over many times I would draw a bath for them, sometimes undressing them both and guiding him into her while telling her I loved her and her telling me she loved me and holding my hand while telling him to cum inside her and then telling me afterwards how much she loves him too.