I don't think that kind of stuff is bribing, its more the thought of "I am fasting, therefore you must answer my prayers" kind of thinking to make sure to avoid in the head. try to keep a mindset of something like, "I am fasting, please answer my prayers" or something. don't demand, instead ask. I think that is all he meant by bribing. I don't think naming a child after the saint one prayed for fertility is bribing, as long as you don't set out in your prayer that "if you give me a child I will name it after you, Saint!"
also something to avoid:
"I have prayed for this amount of time, so I am good"
when it should not be about how long you pray but how heartfelt your prayers are and such
anyway, about your original question, I would say no it is not wrong really, i think it would be better to hope rather than to expect I guess though. I think in the end it is fine to fast and to pray and hope for an answer to the prayer, since fasting helps prayer.
sorry if i make no sense