We all have different needs and different pet peeves, different breaking points etc.
I have a similar life-for different reasons.
I have a husband, a boyfriend, a 12 year old son and a 5 year old daughter who I live with (all ADHD) as well as a dog and a 17 yo cat who has health issues.
THEN, I have a 20 yo daughter and her 21 yo husband, and a 18 month old grandson a couple miles down the road who I spend much time with.
As well as being a college student and having a close relationship with my 18 yo sister, 36 yo sister and 35 yo brother who live nearby.
I can't imagine having another lover.. Where would I fit them?