Lol many say it backwards.
The most responsible advice I should give you would be to wait, and or QT the new clown, and that would give the existing a chance to girl up.
Adding a female now would be rushing a little, few things rushed in this hobby come out good overall.
Being human of course it's hard to say what I would REALLY do, but that is the responsible approach, so do as you wish.
If you had your clown 3 mo it is most likely at least 9mo old just FYI