If Chumbawamba goes to her Dad’s for two overnights a week, that could potentially give her 4 sessions in the gym: Wednesday evening, Thursday morning, Saturday evening, Sunday morning…. Not sure what time he collects her at, but it may not even have to be the evening, she could do a daytime session. The rest of the days do a home workout. You even see people out running with buggys, so she could even go out on a run when she’s with her.
She’s self employed and from looking at her life online, it doesn’t seem like she has any other commitments, so she has more flexibility than most.