Dear It depends on how many nights you will spend

At cairo :

Pyramids
Pheronic village
Old Museum at Tahrir Square
Nile cruise at nile for lunch or dinner
Night clubs and etc......
Citadel visit ( Mosqu...etc.. )
Hussain and azzhar area for souvounirs

Alexandria :

Palastine hotel at montazah is very nice
Also the new hotel i believe intercon at or fouseason can remebr the name at a new mall in the middle of cournich
Visiting Citadel at alex

and a lot wish that i ve helped

Could assist you with more better ideas based on your period of stay & family members attractions