儿子长得不像我你就完了以后儿子要像你可就完了
[ér zi zhăng dé bù xiàng wŏ nĭ jiù wán le yĭ hòu ér zi yào xiàng nĭ kĕ jiù wán le]
This phrase is humorously expressing worry about one's son's resemblance. If the son does not resemble the speaker ('me'), then the wife ('you') will be blamed (suggesting infidelity). And in the future, if the son looks like the wife, that might imply he will carry undesirable characteristics or habits.