Nah you'll just tuck that egg in your backpack - imagine how much whinning could be avoided in BG2 if Aerie did that

Sidenote: OMG maybe the PC is Aerie's baby! Seriously though do we know what's cannon for Bhaalspawn - ascension or renouncement (sorry if that's some sort of common knowledge)?
The exact ending is unknown, but it was probably a renouncement.
In any case, CHARNAME was alive at the time of 1480 DR.
And in 1482 DR CHARNAME was attacked. The attacker's name was Viekang, the only other remaining Bhaalspawn that managed to survive their bloody that ended a century earlier. Vieking attacked his half-brother. The two Bhaalspawn fought one another until one emerged victorious by killing the other. While it was unknown which man died that day, the victor of the battle underwent a gruesome transformation into the avatar of Bhaal known as the Bhaalspawn Slayer. Chaos broke out in the marketplace and many in the crowd were killed.
With all of his children dead, all of Bhaal's essence was freed, allowing for his resurrection. Bhaal was revived, and reclaimed the murder domain from Cyric.