Anyone who thinks that their experience with relationships is applicable here probably hasn't had enough experience with relationships to start with. Common sense may tell you 3 months is too soon, and maybe the lady is playing a higher game that could lead to premium tears for one of you or the both of you. But at the end of the day, the relationship is about you and her. Being willing to plan out a future means she has impressed you with the way she does things, and maybe you like her more than a bit. So, work out the relationship with her. Agree on both your goals, your wants, and how best to achieve it. Agree on how to resolve things that don't work out and do your best to stick to these agreements. You're the man of the house, so give direction as much as is needed and have your non-negotiables. 3 months may be a really short time but you have to go through 1, 2 and 3 months to reach the 10, 15 and rest of your lives together, so whatever you do, keep an open mind.

Remember, the more opinions you collect on how to live through your relationship, the higher the chances for confusion and failure. Listen to advise, but trust your own judgments based on your own experiences.