That depends upon whether or not you are willing to delve into yourself and figure out what you need to do within yourself to accept that she very well could fall madly in love with this guy-without having sex with him anyway &
can you be ok with her being madly in love with both of you?
Can you BE OK with it getting serious with him also?
Can you TRULY SHARE her heart? Not just her pussy?
"Love As Thou Wilt"