The problem is stated as thus:
lim(n->infinity) n+1 = ?
where n is the number of bikes you current have. n+1 is often referred to the number of bikes you need.
There is no bounding statement.
You need to solve the following:
n+1 < s-1
Where s represents your significant other.
If s = 0, n+1 is undefined.
Don't try to solve this algebraiclly. Logic has little to do with it.
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If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.