Is the Usage of Sex Toys Permissible During Intercourse?
It must be understood by both spouses that a sex toy is a secondary form of stimulation. If one becomes accustomed or habituated to using a sex toy, they will become disinclined to natural climaxing.
The sexy toy must not cause either spouse any harm and should only be used with consent.
The Messenger of Allah (Allah bless him and give him peace) said:
“‘Having intercourse (with one’s spouse) is a charity.’ They said, ‘O Messenger of Allah if one of us fulfills his desire, is there a reward in that?’ He said, ‘Do you not see that if he does it in a prohibited way he will have the burden of sin? So if he does it in a permissible way, he will have a reward for that.’”
[Muslim, al-Sahih]
Please see: Not Satisfied with Marital Relations