1

Onion

「血液さらさらで健康が一番」（by白猫）

２

No,

because the widow has lost

her husband,

so, dead man can not marry

to anyone.

「なるほど。」（by白猫）

1

They are

grandmother, her daughter, and her granddaughter,

three of them.

"her daughter" can be

mother ( to the granddaughter ) and daughter.

「簡単だったっすか？次回もお楽しみにね！」（by白猫）