The answer to this depends upon many factors including the exact type of implants you have, how they are placed with respect to the pectorals muscle, the length of time it has been since surgery and the quality of your tissues, and the exact position that you are in, including the position of your arms. At 3 months postop it is still fairly early, and the tissues may still be in the process of relaxing and softening, especially if you started out relatively small breasted with tight tissues. Furthermore, if the implants are in a sub muscular position or a dual plane location, any position that puts tension on your pectoralis muscles will also place tension on your capsules and thus make your breasts a bit firmer in that position. This will be especially true in positions with your arms outstretched as you are showing in this picture. This is not necessarily an abnormal thing. In addition, if you have highly cohesive ("gummy bear") implants or overfilled saline implants, that will make the breasts firmer than others with different types of implants. The one encouraging thing that you mention is that they aren't firm in every position, and they seem to be "soft" in some positions. Tightness of capsules isn't an "all or none" thing; it is on a spectrum, and some may be tighter than others, and that doesn't necessarily mean that there is clinical capsule contracture. As this are issues that can only really be sorted out with a personal examination, the best thing to do is to contact your surgeon and express your concerns so that he or she can evaluate you properly in that light and advise you accordingly. If in fact it does appear that you are developing early capsule tightness, there are some medications and other interventions that can be employed that may lessen the chance of a full-blown capsule contracture, and your surgeon will be aware of what those are and whether or not you should use those. So, there is value in getting a proper evaluation now, even if it is ultimately just for reassurance and to be told that nothing is wrong at this point. That's better than guessing or ignoring a potential problem. Good luck.