so it was very planned!! since tony had to stop hormones and everything lol. but heres the story:

so sosa had his first daughter with his wife gabriella mostly to pass as straight better. cuz like. thats what straight men do! have kids! so his plan was just to financially support the kid + his wife and not really be that present but as soon as she was born he was like. oh my god i would protect this thing with my entire life

he surprisingly loved being a papa! and him and tony were already dating when isabella was born, so he got to see sosa being a cute papa with a cute baby a lot, especially when he officially moved in.

it got to the point where tony started to get incredibly jealous of the whole situation. he didnt hate the baby of course (hes not that fucked up) but he was like "oh my god that needs to be with my baby". so eventually tony so casually was like "hey. you wanna have another one? with me" <--- like its soooo not a big deal or anything (imagine it like when he was asking elvira if she wanted kids just like way too casual and weird)

so... they do! and tony continued playing it aloof until he finally got that positive pregnancy test and he couldnt help his big goober smile :')