Script taking ModuleScript's Functions as it's own?

I am making a moduel script to tween weld's C0 and C1 but I am making a breaker as well the problem is when I call the function thru a script it wont let me call anything till the module script's function is done running. Any way to fix this?

here is the Module Script's code

local tween = {}

function ifweld(obj)
    if obj.ClassName == "Weld" or obj.ClassName == "Motor"
        then
        print("Tweenable Object")
        return true
    else
        print("Untweenable Object")
    end
end


tween.StopTween = function(weld)
    print("Function StopTween Called")
    check = ifweld(weld)
    if check == true
        then
        if weld:FindFirstChild("Tween") ~= nil
            then
            weld:FindFirstChild("Tween"):remove()
            print("Stopped Tween")
        end
    end
    print("Function StopTween Ended")
end

tween.Tween = function(weld,C0,C1,dur)
    local prints = 0
    prints = tostring(prints+1)
    print("--["..prints.." Function Tween Called")
    check = ifweld(weld)
    if check == true
        then
        if weld:FindFirstChild("Tween") ~= nil
            then
            prints = prints+1
            print(tostring(prints).." Running tween prevented called tween")
        end
        if weld:FindFirstChild("Tween") == nil
            then
            prints = prints+1
            print(tostring(prints).." Availible")
            local breaker = Instance.new("StringValue")
            breaker.Name = "Tween"
            breaker.Value = "Tween Breaker"
            breaker.Parent = weld
            --
            for i = 1, 100 do
                wait(1)
                if weld:FindFirstChild("Tween") ~= nil
                    then
                    print("Found")
                else
                    print("Not Found")
                    break
                end
            end
            --
        end
    end
    prints = prints+1
    print(print("--["..prints.." Tween Ended]--"))
end

return tween

here is the Script's code

local tween = require(script.Parent.WeldTweener)

tween.Tween(script.Parent.Part2.Weld)
wait(.5)
print("Stopped")

the break work's if the stop function is called out of the script that called the tween also.