If I remember correctly they loved Terrie around the time the mum was sick even when she breadcrumbed having cancer and was so worried she couldn't eat the lunch David had packed for her.
The thawing of relations happened when Terence Nightingale put her self on the front line during COVID and did four shifts. It was discussed here that going back nursing helped fast track her getting got to a vaccine
She single handedly kept the health care system working while Nikki and Aimee were gone down the rabbit hole of anti vaxx .
They are both doses who are used to bossing the men in their life around . Both want to be the best girl boss, alpha female , boss mama so their egos won't let the concede