One's first love is the first person one fell in love with, and in many cases the first person one had sex with. Often, a girl's first love leaves her alpha widowed:
Women only have one shot to love the way we want them to…and that’s a girl’s first love. Left to her own devices, she will always spend that precious collateral on the worst man possible. It’s the reason that virgin brides have the lowest rate of divorce; they’ve actually saved themselves to bond with their husbands. If not, there will always be three of you in the relationship….the wife, the settled for husband, and the ghost of Alpha past.