I tried to pair up everyone for the children chars even if I didn't use them but my main pairs:
Chrom x Olivia - just seems like Inigo should have been Chroms son imo which inspired this
Avatar(M) x Cordelia - was love at first sight i guess. also Severa turned out wonderul
Morgan x Inigo - since Chrom and myself are tight, our kids fell in love yada yada
Gerome x Severa - my second daughter + a total bad ass = great things
for the most part the rest of my supports are all just at a/b and all the children were on the spot cause i kept changing who I've been using ;p