It is never a good idea to house more than one snake together. There is the chance that they will cannabilize moreso I find with babies than adults.
The general "rule of thumb" for breeding is 3 x 3. ( 3yrs old, 3ft long, at least 300g ) 6.5oz = 184gr . I would wait until next year before breeding as your girl is too small right now....
Having them housed together, could result in her being bred and causing egg binding issues because she is too small. Males generally are ready and able to breed before females. Depending on your male's age, he could be ready but she is not. I would highly recommend seperating them so she does not become gravid, and you risk losing her.