I just took a quick pass at this and the models seem pretty obvious. Lily is a Gen 3 Female that is either Victoria 7 or based on the same. I think she is Danique... if you look at the lips, body blemishes and areolas they match. The skin tone is different, but that can be adjusted. The outfit is the Breakfast in Bed pajamas. I do not have the same hair asset and I could not find it after a cursory search and the glasses I used is different. The guys are also stock models.
Lily
Model -
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Outfit -
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Mark
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Bob
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Outfit -
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Assets I have not been able to find.
Apartment/home/office
Lily's hair and eyeglasses
There may be other assets like some of the bottles and misc items but I didn't go into that detail.
I did a quick render with the assets I did know. Obviously there is still work to be done. The skin tone needs to be adjusted, the breast morphs need to be tweaked and there is some work to do on the lower part of the face, but as you can see, it is pretty close with just the base and some basic morph work.