There was no way on earth she was settling down with Victor. Victor was good for dating and good in bed but definitely not for marriage.
He was a lady's man and Mimi couldn't stand drama with other women; she can never be a side chick. She was worth more than that and any man she was going to be with had to show that level of dedication.
Aside from that, Victor was consigliere to a Mafia Lord and his entire family was in the Mafia. Mimi can't survive the life of being in constant danger.
She was barely his girlfriend and Draco kidnapped and messed with her for revenge. What happens if they get married then? Would she have to live her entire life looking over her shoulder for danger and never trusting anyone? She didn't want such a life for her children either.