It sure was very interesting to read about the different takes on Mr Lothario. Now, I'm not the one who feel like playing after given rules or backstories. So I have my own way of handle him.
I do have the game installed on a laptop but I do not play him (or the Caliente family) there. But in my desktop install I do play him and there I have moved him out of the big house. Instead of making drama with the Caliente sisters I got him hooked up with Ms Elin Borg (originally a townie who I gave a makeover and I liked her so much that I took her into game play). And it works perfectly. Don is a top career astronaut and make a lot of money. Elin is a skilled gardener and make money on selling homegrown items. In the first picture we see them in the greenhouse that I did build.
https://live.staticflickr.com/65535/52819074836_8bd8a4bec9_b.jpg
They are not married yet, only engaged. I thought I should wait with the wedding until summer (I never had a real wedding in any version of the Sims).
https://live.staticflickr.com/65535/52818512062_8e68738667_b.jpg