I don't know about that, but i got another idea. Tia is an athlete too at WVM, so that's likely another reason why she insisted on MC using a condom. Not wanting to get pregnant while completing in her sport (Yet to be revealed, I'll assume is Track & Field) and miss out on the season, also just not wanting to be a mother right now.
Same reason as Keyana, an athlete too with upcoming competitions. Who only did anal with MC and had Brittany be the one to get pregnant by MC and not both at this moment of the baby-making deal.