How long will we have to be in couples therapy?
The type and severity of issues you're coming with, your motivation for change, the length of your relationship and frequency of sessions can all play a factor in how long you need couples therapy for. Communication problems, disagreements about topics such as parenting, finances, career, lifestyle could be worked through within a relatively short time in couples therapy. However, deep chronic issues such as infidelity/affairs, trauma, trust breakdown require longer therapy.
Is it OK to talk about sex in couples therapy?
You should talk about sex in your couples therapy especially if your couples therapist is a psychosexual therapist/sex therapist as well as a relationship therapist. Couples that struggled with emotional intimacy are also likely to struggle with physical intimacy.
Talking about your sexual relationship with your couples therapist is going to help you understanding your needs and boundaries (that might be the root of your communication/relational issues), explore the unmet emotional needs showing up in both your sex life and relational domain. It can also lead to building a healthier and more satisfying connection and bond in your relationship.
Is couples therapy going to save my relationship?
Whilst couples therapy can help your relationship, you cannot lean in too much on the idea that it will "save" your relationship. It is important to be realistic of the various factors and complexities of relationship and power of therapy. Unfortunately, couples therapy is not a magic wand that can put a spell or magic dust on your relationship to save it or "fix it".