I just think. If Jon was little. Then maybe he wouldn’t even think to protest Elias entering him without protection. Wouldn’t even know what a condom was, nevermind that why he might have wanted one when he wasn’t small like this. And Elias could promise to leave him round and full with a little sibling and he still wouldn’t think about the consequences. About anything but being a good big brother. Would be excited to grow a baby just for his dad. And every time he’s back to normal he gets furious with Elias for it. For not thinking. For willingly risking a pregnancy when he knows Jon doesn’t want one (not then. Not when he can think about what it would really mean. To have his whole life upended as his womb fills with Elias’ baby, the health risks, the time off, caring for the baby, when it’s born). But he keeps coming back. Every time when he needs to lose himself entirely to the sensation of having a loving father. To be small. And of course when he does he doesn’t fully understand what they’re doing. Just that it feels very good to be held by his dad. To have his dad inside him making him full. To have a piece of his dad inside him that he carries with him everywhere, every day for nine whole months. <3 And of course it’s only a matter of time until it takes <3