So mia went out with Manley at a young age, they broke up and Manley got with Erin. Erin got pregnant and during the pregnancy, they broke up. Mia and Manley get back together. mia gets pregnant and Manley stays with her for a bit. After the whole series 2 (or 3?) drama, mia breaks up with Manley and after a while Manley got back with Erin.
Erin and Manley broke up again a few months later and now everyone’s single
I’m assuming mia doesn’t talk at all with manleys family just because they were so horrible to her. Manleys family seem like the type of family to just be flat out loyal to Manley and won’t engage with mia if it upsets him (which it probably does)