Dale when he comes home (If they went to his place I mean)
That said, not exactly thrilled with the outcome because... Well... Sven... But pleased with how happy May seems.
OK, maybe I read her expression wrong, but... she doesn't seem THAT happy to me? If this is a smile, and not a general, somewhat ambiguous "so... that happened" expression, then it's a pretty "slasher killer" smile in my book.
EDIT: I think it's the eyes. With a genuine smile, eyes narrow (I don't know how true it is for May's chassis, but with no other data, I assume her facial expressions work like they would for a human). Her eyes are wide and the pupils/irises are small, which in comic book visual shorthand does indicate a strong reaction, but doesn't exactly register as "blissful" to me.
EDIT 2: I'm not saying May is not satisfied, I'm just reading her expression as, well... expressing more than just happiness. Charitably, I read her face as a mix of happy, overwhelmed, and a little weirded out? Which in itself would be interesting for character development, because May expressing strong emotions other than contempt and anger is comparatively rare. For one, I'd love to see what happens when May is overwhelmed by anything (especially after her recent statement that sex is simple, but I digress).