The manipulation of a child

Lexi has been sleeping through the night since she was 9 weeks old. Well since her teething when she wakes oscar has been bringing her down to our room. Big mistake. Now when she wakes at night she cries and cries. She won't put herself back to sleep like she used to. So we have to retrain her again. I just got done rocking her and then put her back in her crib, she started crying again and stroked her till she stopped crying. Man, I thought I stopped doing this ages ago!