His wife is not very interested in intercourse so he resorts to masturbation

 

I am a man of a strong desire. I like to have intercourse everyday. When I try to start it with my wife, she refuses for weak reasons like saying she is tired or lazy to make ghusl or because she wants to delay it to next day. So I have intercourse with her only twice a week. I cannot be patient. So I have to masturbate by my hand fearing to fall into adultery. Although I know it is haram, I masturbate about three times a week while my wife is beside me and she knows what I am doing. My wife cares a lot about beautifying herself and using perfumes, but she becomes annoyed if I ask her for sex. Am I sinful to masturbate by my hand? If yes, then does my wife share in this sin?.

Praise be to Allaah.

Firstly: 

The husband has to treat his wife kindly, because Allaah says
(interpretation of the meaning): 

“and live with them honourably”

[al-Nisa’ 4:19] 

Part of living with one’s spouse honourably is having
intercourse, which is obligatory upon the husband, as much as is sufficient
to satisfy her, so long as it does not harm him physically or distract him
from earning a living. 

The wife is obliged to obey her husband if he calls her to
his bed, and if she refuses then she is sinning, because of the report
narrated by al-Bukhaari (32370 and Muslim (1436) from Abu Hurayrah (may
Allaah be pleased with him), that the Prophet (peace and blessings of
Allaah be upon him) said: “If a man calls his wife to his bed and she does
not come to him, and he goes to sleep angry with her, the angels will curse
her until morning.” 

Shaykh al-Islam [Ibn Taymiyah] (may Allaah have mercy on him)
said: She has to obey him if he calls her to his bed, and this is a duty
that is obligatory upon her. … If she refuses to respond to his call, then
she is being disobedient and wilfully defiant. … as Allaah says
(interpretation of the meaning): 

“As to those women on whose part you see ill‑conduct,
admonish them (first), (next) refuse to share their beds, (and last) beat
them (lightly, if it is useful); but if they return to obedience, seek not
against them means (of annoyance”

[al-Nisa’ 4:34] 

End quote from al-Fataawa al-Kubra (3/145, 146). 

But it is not permissible for the husband to force his wife
to do that for which she is not able with regard to intercourse. If she has
an excuse because she is sick or she cannot bear it, then she is not sinning
if she refuses to have intercourse. 

Ibn Hazm (may Allaah have mercy on him) said: Both slave
women and free women are enjoined not to refuse the master or husband if he
calls them for intercourse, so long as the woman who is called is not
menstruating or sick and likely to be harmed by intercourse, or observing an
obligatory fast. If she refuses with no excuse then she is cursed. End quote
from al-Muhalla (10/40). 

Al-Bahooti (may Allaah have mercy on him) said:  

The husband has the right to enjoy his wife at any time, so
long as that does not keep her from performing obligatory duties or harm
her; he does not have the right to enjoy her in that case, because that is
not part of living with them honourably. But if it does not distract her
from that or cause her harm, then he has the right to enjoyment. End quote
from Kashshaaf al-Qinaa’ (5/189). 

The wife whose husband is harming her by having intercourse
too often may come to some agreement with her husband concerning a specific
number that she can put up with, and if he does more to such an extent that
it is harmful to her, then she has the right to refer the matter to the
qaadi (judge), who may determine a specific number and oblige both husband
and wife to adhere to that. 

Secondly: 

Masturbation is haraam, because of evidence that we have
quoted in the answer to question no.
329. 

There is no sin if the husband is masturbated by his wife’s
hand, because it is permissible for him to enjoy her; the same applies if he
ejaculates outside the vagina, because of the general meaning of the verse
in which Allaah says (interpretation of the meaning): 

“And those who guard their chastity (i.e. private parts,
from illegal sexual acts)

6. Except from their wives or (the slaves) that their
right hands possess, __ for then, they are free from blame”

[al-Mu’minoon 23:5,6].  

This has been discussed in the answer to question no.
826. 

If the wife will be harmed by intercourse, she will not be
harmed if her husband enjoys her in other ways, so she has to allow him to
do that. 

Both spouses have to tackle this problem in a kind, loving
and frank manner; and each of them should understand the rights and duties
that they have, because most marital problems stem from ignorance of that. 

Some husbands are keen to satisfy their own desires, and they
hasten to do that without caring about their wives or paying attention to
their right to pleasure, so the wife finds no enjoyment in it and is put off
by it, and it becomes a problem and a burden for her. 

Hence we say: Strive to create love and affection between you
and your wife; pay attention to her situation and understand her feelings;
avoid that which will harm her or hurt her. Tell her of the shar’i ruling
concerning this issue and help her to follow it, and do not put her off, and
be moderate in your approach, and you will get what you want.  

May Allaah help us and you to obey Him and seek His
pleasure. 

And Allaah knows best.