Something about masturbating lol. Looks like it says "Then should I say ------ think ----- every ----- --en (Probably says when) you mastu-----" <3

Sure looks like:
"Then should I say who you think of every night when you masturbate."

In the parent post, she says "じゃあ毎晩誰？おかずにオナ？？？？る？ば？？？？お？？？？". The only words clear here are "every night", "who", "think of" (おかずに means "as a masturbatory aid", or literally "as a side dish" haha), and "then" or "well".