By the time that bit came up I was trying to sever my carotid artery with my popcorn bag. In hindsight it wasn't a truly offensive scene, I figured it was hinting at the idea that David could actually control the xenos. But nothing came of it.
Like everything else in this movie, if the movie had actually worked to develop things further the scene would've been rather epic. I mean, this was supposed to be the culmination of David's efforts, to create the perfect organism in his eyes, and it could've been an epic re-entrance for the alien. As it stands, it's just a silly scene where David gets cute with a baby alien. Certainly not the worst part of the whole movie (coughcoughbackbursterscenecough).