Future and Ciara didn’t stay apart for long … and it’s all because Ciara feels strongly about her son needing his father around 24/7.

Sources close to Future tell TMZ … he and Ciara are living together again — and trying to make things work between them — so Future can help take care of their 4-month-old son, Future Zahir.
Ciara must be willing to overlook the past … since she was the one who claimed Future cheated on her while he was on tour — and then broke off their engagement last month.

We’re told Ciara wasn’t interested in a shared parenting situation … saying she believes Future’s a good father and that it’s best for their son if his dad’s there.
Pretty selfless of her, if she really believes he cheated.