Adopted Children

30. A woman may not be alone with an adopted son aged nine and above. A man may not be alone with an adopted daughter aged three and above.1 To avoid Yichud, the door should be left unlocked.2 Anyone considering adoption should first speak to a Rav about all the Halachic ramifications of adoption.3

Orphans and Stepchildren

31. The same rule applies to an orphan, stepchild or foster child.4

32. A man may not be alone with his stepmother, nor a woman with her stepfather, even if they grew up with them.5 To avoid Yichud, the door should be left unlocked.6

Note: In the above cases, the heter of an “open door” only applies during the day or in the early hours of the evening when there are passersby; however, late at night, either both parents must be at home or another shomer or shomrim present.7

Converts

33. It is permitted for a convert (a Ger or Geyores) to be in Yichud with his or her parents, children or grandchildren whether they have converted or not.8

34. It is permitted for a convert to be in Yichud with his sister whether she has converted or not. However, they are subject to the same rules as the Yichud of a Jewish brother and sister — see previous section.9

Where One Parent is Jewish

35. A Jewish man who has had a daughter by a non-Jewish woman is permitted to be in Yichud with his daughter whether she has converted or not.10

36. A Jewish woman is permitted to be in Yichud with her non-Jewish father.

37. A woman who wishes to stay in the house of a couple who are intermarried r”l should consult a Rav.11

Dating or Engaged Couples

38. It must be stressed that a man and a woman who are out on a Shidduch must not allow themselves to be in a Yichud situation. Therefore, they must meet either in a home where shomrim are present or in a public area. Even when at home, they should leave the door to the room they are in unlocked, and it is a middas chassidus to leave the door slightly ajar. It is absolutely forbidden for them to drive to a secluded country spot or isolated park or forest, etc. They should not drive alone late at night, and certainly not out of the town.12

39. This halachah applies even more strongly after the couple are engaged to be married.13 They must be extremely careful to avoid Yichud and negiah (affectionate physical contact). The fact they are engaged gives no permission whatsoever to be lax or lenient in the halachah.14

Ex-Partner

40. A divorced couple must keep all the laws of Yichud. If a divorced man comes to visit his children in the home of his ex-wife, or vice-versa, they must keep all the laws of Yichud.15