Interestingly this sleeping posture for Gwen is canon. I remember catching the scene ages ago when it first aired on TV and it of course caught my attention. In the scene she wasn’t in her pajamas, which it seems the artists often forgot she had canon pajamas since episode 3 of the series. It took me some time to hunt it down when I was looking for screenshots as I readied for this comic but it was worth it.
Side note, I’m not sure if I’ll be keeping the socks on Ben in the lines. I realized after looking at the references again that not all of the pajama shots I have put socks on Max or Ben, although Gwen seems to always have socks on with her pajamas.