If you are my parents, you should lend me some money.
If you were a good mom/dad, you would give me some money.
ーIf you are my parents, you should lend me some money.
「親なんだったら金かせよ」
if you are my parents と言うと良いですよ。
ーIf you were a good mom/dad, you would give me some money.
「母親なら/父親なら、金くれよ」
If you were a good mom/dad のようにも言えます。
ご参考まで！
カナダ 
