There are no particular rules and laws either in foreplay or in intercourse. The only laws and rules are the ones reached by the lovers by mutual and often unspoken understanding. Whatever is pleasing and satisfying to both the husband and the wife is right and proper; and whatever is mutually displeasing is wrong. The only limitation to this general rule would be any Shariah rule which goes against the wishes of the husband or the wife. Islam emphasizes on foreplay.
Is it halal to have oral sex with the spouse? - Islam Stack Exchange
It began when Dr Rashad Khalil, an expert on Islamic law from al-Azhar university in Cairo warned that being completely naked during intercourse invalidates a marriage. His ruling was promptly dismissed by other scholars, including one who argued that "anything that can bring spouses closer to each other" should be permitted. Another religious scholar suggested it was OK for married couples to see each other naked as long as they don't look at the genitals. To avoid problems in that area, he recommended having sex under a blanket.
I wanted to learn whether all kinds of sexual activities done in the name of foreplay are allowed. Should foreplay not have some restrictions in the name of purity and decency? Is it possible for a wife to refuse some foreplay activities? Would it be sin for her? Would it be considered deviation from her sexual duty towards husband?