I'd feel like a real hypocrite... If I hadn't spent the last season bitching about the way this show now treats women the exact same way.
At the Stormcage the Doctor invites River to stay aboard, but she points out that she escapes whenever she feels like it -- to the point they didn't even bother showing us how this time -- and that she's got a "promise" to fulfill, which he'll eventually understand. (Spoilers? Or is this a known thing she's referring to? The old story about their relationship would seem to suggest it's a clue, but the retcon in this story that they're back-to-front implies we already know what she's talking about, which means the Doctor should too, but obviously the reverse is true.)
He leaves without a kiss, and she's surprised; she pulls him in and lays one on him, and his arms flap around and flail. Somewhere along the way, as he's backing slowly into the TARDIS, looking terrified, she realizes what's just happened, and her heart breaks a little.
Doctor: "You know what they say, there's a first time for everything.
River, when he's gone: "And a last time."
The Doctor sends Rory into another TARDIS room for some technical stuff, and discusses with Amy about how she is or is not pregnant. She says no, but it turns out that "is or is not" is closer to the truth, as the Doctor sees at the end of the episode in a second: A scanner thing keeps flipping back and forth between both states, like Schrödinger is the babydaddy. So they have this whole conversation about how she told the Doctor but not Rory about the scare because the Doctor is her "best friend," aww, while Rory's just... Rory.
Ha! I'm kidding. Her actual thought process actually makes sense: "I traveled with you in this TARDIS for so long, all that time. If I was pregnant for some of it, wouldn't it have had an effect? I don't want to tell Rory his baby might have three heads or, like, a timehead, or something."
Timehead! I love it. I legitimately love it. They get the giggles about what a timehead-baby would actually entail, and then of course she screams into the mic for Rory to come back, because of course he was listening the whole time, because what is creepier or more Moffaty in this universe than having an always-on microphone that monitors your wife's movements and statements? Nothing at all is what.