I’ve done with my partner and an ex FWB in the past many times.
I suppose the first thing to understand is the relationship with your sugarbaby. See all mine have been with a partner of some sort, so I was always keen to make sure she had a say in what and more importantly who we saw. I could give some guidance on genuine bi girls working London.
If the SB is more a paid arrangement, firstly I have no experience, but I imagine it’s about only what YOU want while ensuring the girls work well together, and Hendrix would probably be better suited for guidance.