Your sister is born in Leo ascendant which is a fixed sign. Moon is in Krittika 2nd quarter in Taurus a fixed sign. Krittika is ruled by Sun and Sun who is the lord of ascendant is in 12th house. It is weak. Sun gives high self respect and nobility. Their desires would be on costly and luxurious. When Sun is weak, they will get short temper and shout like anything. She has fixed ideas and very obstinate. She has belief in herself and will not pay attention to anyone except herself.
Lagna sublord Mercury is in 12th house Cancer, a watery sign. Mercury is signifying Saturn in 6th house and Saturn is aspecting Mercury. It is too a minus point. Mars is aspecting Venus and Jupiter in lagna. Mercury, being sub lord of lagna, in a watery sign gives her emotional nature, sensitive and sometimes has very good imagination. But because of Saturn aspect she forgets at appropriate time. She will have aim to do a high level job and likes status. When she could not get them, she will naturally shouts upon all, as there is no other go for her to let out her feelings. So you have to pacify her with soothing words. She will keep quite.
Saturn is in Moon star. It is also a minus to her. She will postpone things. Her mind would be changing at be in different moods in different times.
She will get a job after 02-09-2028. There are chances to go abroad also with great difficulty. She will not settle permanently. After July 2029, she will enjoy her career.
I presume that she will unite with her husband after April this year. But it would be for a short period. She may be going and coming back. After 2029 July, there would be joining with her husband, as she gets a job.
There are chances for children in 2028.
Note: Don’t shout or show supremacy , authority on her. Please convey your ideas with patience.
Remedies : Ask her to read Ganapathy slokas to give her a stability in job. You also perform Ganapathy pooja and offer him Undrallu (Rice balls). It will give her mental solace.
Good Luck
JVS Rao (KP system follower)